Carole Hooven, Harvard’s behavioral endocrinology expert, explores testosterone’s role in shaping male aggression, sexuality, and athletic dominance—like muscle mass advantages persisting even after hormone reduction—while debunking myths linking it to rape or gender identity. She contrasts evolutionary biology with cultural objectification, noting how trans athletes’ experiences with testosterone reveal altered desires and emotions, though human brain sexing remains imperfect. Rogan defends fair competition in sports, citing cases like Fallon Fox’s boxing injuries and Connecticut’s record-breaking biological males, but Hooven urges balancing science with empathy. Their raw dialogue—rooted in vulnerability, discipline, and respect—challenges online polarization, proving that honest conversation fosters growth over ideological battles. [Automatically generated summary]
Joe Rogan Podcast, check it out The Joe Rogan Experience Train by day, Joe Rogan Podcast by night, all day Hello Hi Welcome, thanks for doing this Thank you so much for having me I'm excited to talk about this.
But the short story is that I teach at Harvard about hormones.
I teach a course on behavioral endocrinology.
It's called Hormones and Behavior.
And I've taught that for a long time now.
And I got my PhD at Harvard studying testosterone and behavior, studying sex differences in the way we think and process information.
And I just love the topic.
I love how much understanding testosterone helps me understand the world, understand men.
I'm not a man.
I don't really understand men or how they work.
But understanding this hormone really has helped me a lot.
And then in teaching about endocrinology, and specifically testosterone, I get so much feedback from students about how it changes their lives, changes how they understand themselves personally, how they understand their relationships, how they understand the world.
And it's empowering for them, and it's been empowering for me.
And so I've just always had this natural intellectual enthusiasm for this topic.
But I'd say in the last five years, I felt like the science was coming under attack.
And there's been...
Kind of a program to dismantle the science of testosterone and how it shapes behavior, particularly the evolutionary basis of behavior, has kind of come under attack.
The idea that sex differences are grounded in biology, and I know that testosterone is a really important part of that.
And there's a movement to kind of discredit that science or downplay the importance of biology and specifically testosterone in our lives and especially in sex differences.
And I'm fascinated by sex differences and I'm fascinated by how evolution shapes sex differences across different species and how it works.
And so that's ultimately why I wrote the book because I kind of want to get all the science out there And kind of push back against what I see as an attack on really good science.
There's nothing wrong with understanding who we are from a biological point of view.
And I think we should all be open to that and learn as much as we can about who we are and how we work.
Yeah, I agree with you, but I also think it's fascinating when I watch the attack on the science of biology, the science of how...
I think that if we were an objective observer, like something other than human, and we're watching human beings...
We would be really interested in the sex differences between the male and the females and why there's this real clear pattern of behavior on both sides.
Obviously, there's a spectrum in that pattern, but depending upon the levels of hormones and the genetic variants, there's a lot of consistency and what is causing this and what is it about male behavior that leads to this and female behavior that leads to that.
But then you get into this weird thing where ideology has somehow or another overtaken science with a lot of human beings today.
So they're willing to abandon science if it's inconvenient for their ideology.
It's very strange because you see really intelligent people doing this.
And I think the fear is that the science is getting in the way of the ideology.
So I agree with most of the goals of the people who are ideologically motivated.
We want to reduce human suffering.
We want to make sure that we have equal human rights for people who have all kinds of differences.
And so I agree with all that, but I don't think that if science tells us that some of these differences are grounded in biology, that means that, A, these traits that may be like extreme male aggression.
That doesn't mean that that's immutable.
I mean, we have tons of evidence that it's not immutable.
Humans have control over their behavior.
It depends heavily on the culture.
So denying the importance of, say, testosterone in male aggression is Isn't going to change the way that sort of differences in our natures or the impetus for males to feel more than females, that they want to be physically aggressive or to respond aggressively in certain situations.
And I like that you said that you implied that there's lots of overlap in behavior between males and females and the degree to which that is grounded in biology.
So the point isn't, and I just want to make it really clear at the beginning, it's not that females are like this and males are like that in humans or in other species.
And especially, you know, culture plays such a huge role in how we develop and how we express ourselves.
But even apart from culture, there are Differences on average.
So there are some females who are highly physically aggressive and there are many males who are really emotional and sensitive and totally peaceful.
Can I say that you just said you tear up sometimes?
Okay, so yeah, no, and I just cry when I'm moved or passionate.
I cry a lot, and I actually talk about that in the book because there's a relationship with testosterone there that we can talk about later, which is really interesting.
But the point is that, you know, my book, Tea, is not about not trying to explain why males are one way and females are another way, but why we're different on average, why we have somewhat different natures.
And testosterone is, to me, the most powerful way To understand those differences in our natures, you know, from an evolutionary point of view and looking at how we as animals, as mammals, try to maximize our reproductive success, right?
And so that's what testosterone does, is it helps males maximize Basically, the number of offspring they have through increasing mating opportunities.
It doesn't mean that males are only interested in having tons of sex and tons of sex partners, but they're definitely more interested in that than females in humans.
And in many other species where increasing the number of mates yields reproductive benefits for males, but not females.
And that's what sex hormones do.
Estrogen and progesterone do similar things in women, but it doesn't motivate us to fight aggressively for mates.
Clearly, if we were looking at this again as an objective observer, we would see all this.
There wouldn't be any debate.
It'd be like, this is fascinating.
Well, this is why.
They've only been around for a couple hundred thousand years, and for a long time they were eaten by jaguars, and so they had to make as many babies as possible in order to ensure survival of the species.
All this makes sense.
Did you talk to any people that have switched genders?
Yes.
What was that like?
One of the things that I found fascinating was listening to Chaz Bono talk about his transition and how he just kind of got it once he started taking testosterone.
Like, oh, this is what the fuck's been going on with the world.
So I try to understand how testosterone works in humans by first thinking about it from an evolutionary point of view.
What is the purpose of sex differences and sex hormones?
Why do male animals have high testosterone and females have high, say, estrogen?
And what do those do to our bodies and to our psychology to help us Maximize our reproductive success, meaning have ultimately sort of as many get our genes into the next generation as efficiently as possible.
So one way is to look from an evolutionary point of view.
Another way is to look at different kinds of experiments in non-human animals.
And then another thing we can do is look at what happens in humans who change their hormone levels.
And this is absolutely fascinating because we have some examples of that happening right now.
So I talk to people for the book and I use their words because they're the ones who are living through these experiences and I wanted them to tell what it was like.
So I interviewed a male-to-female transgender person, a female- To male transgender person, a non-binary person who is taking puberty blockers, and then somebody who is female who transitioned to male and then transitioned back to female.
So I got this really wide range of experiences and I thought that What they had to say was incredibly powerful, and I can describe some of what they said, which helped me to understand myself better, helped me to understand my husband better, and really just had a big impact on me personally.
I found this evidence really sort of moving and powerful.
But one thing I want to say before we talk about that is that one of the biggest Influences on human and non-human sex differences is differences in the womb and what happens to us when we're inside our moms as fetuses developing.
So males have testes that produce male levels of testosterone in utero.
And that testosterone, that's called a perinatal effect or an organizational effect.
So that's early on in life.
We start out right from the get-go with these very different levels of testosterone, and that shapes the brain and body.
So it helps to develop the genitalia, internal and external genitalia.
So it changes male genitalia to, say, form the penis and internal structures.
But at the same time, it shapes the brain.
So the cool thing about sex hormones, which are steroids, is that they can just get right into the brain and alter neural development.
And that's what happens early on is we have these big differences that shape childhood behavior.
So everybody pretty much can accept that little boys behave differently on average, again, from little girls.
Boys are definitely, all over the world, much more interested in rough-and-tumble play.
So, you know, I'm somebody who used to love to climb trees.
I played baseball.
I was pretty aggressive, I would say, which is a little bit more on the masculine side, so I'm just illustrating that, you know, again, this is kind of a spectrum, but we have these differences where Boys, including my son, who does not like baseball and is not as kind of probably boyish in some ways as I was, but he tackles his friends.
Like, one of his favorite things to do is to, like, roll around on the floor and try to pin each other down.
Boys do this a lot, and girls typically don't.
They do other stuff on average.
That is...
It seems to be consistent with what we see in non-human animals and a result of early exposure to testosterone because the levels, so in boys, levels are high at certain periods in utero and then go up again for a short period of time after birth.
That seems to have these effects on the brain that shape that rough and tumble play.
And it's not an accident that they're That boys have higher sort of aggressive physical play because that's what, in a different environment, in our sort of ancestral environment, they're practicing those skills that they would have needed for physical male-male status competition.
So in our modern environment, males have different ways of competing that don't necessarily require physical competition, but it requires other kinds of behaviors that testosterone also seems to promote.
I think I'm—this is a long-winded answer to your question, which I no longer remember.
No, no, no, it's great.
Don't worry about that.
So—oh, you—okay, so about the trans thing.
So the reason I'm going into what happens prenatally is because the evidence that we get about testosterone from looking at transgender people is really interesting.
However, if you are a female to male transgender person and what happens when you if you decide to alter your hormones, not all transgender people will want to alter their hormones.
Some people just will change sex socially.
They'll change their pronouns.
They might adopt the clothes, say, or behaviors of the opposite sex.
But many people will want to alter their hormones to be consistent with those of the opposite sex.
So if you're male to female, that would mean blocking testosterone and increasing estrogen.
And if you're going the other way, female to male, that means blocking estrogen and jacking up your testosterone.
So we can look at that evidence, but we have to remember that once people transition, say if a male transitions to female, that person, so we'll call that a natal male, had high testosterone in utero.
So even though as an adult they might not have testosterone, and we can look at what their behavior looks like as an adult when they block testosterone and start living as a woman, there's something different about their brain.
So that their brain has been masculinized in utero.
And female brains, you can say, have been feminized or not masculinized.
Most of the evidence that we have is from non-human animals, that we have clear differences in the brain, that one area of the brain is called the sexually dimorphic nucleus of the preoptic area of the hypothalamus.
And the hypothalamus is an area that basically controls the action of the pituitary, which is kind of the master gland for controlling all of our many, many hormones in our body.
And the sexually dimorphic nucleus, so sexually dimorphic means basically different sizes or shapes in each sex.
So testosterone increases the size of this.
We know that it increases the size of this part of the...
Hypothalamus.
And then that predicts male sexual behavior, mounting behavior, say, in rats.
So we know that sex differences in testosterone in many nonhuman animals do change, do help to explain differences in the size of different areas of the brain.
But there are also really small differences in just parts of the brain and how neurons, say, branch or make connections.
So they tend not to be, in humans as far as we know, big, obvious differences like the SDNPOA, but there are some suspected differences in human brains that are due to testosterone differences, but we don't have that kind of evidence.
I guess I'm not an expert on the brain But it's subtle differences in, say, branching or neuronal connections or the birth and death of neurons in utero.
So differences in testosterone can cause differences in the population of neurons or the number of cell bodies in different areas or the way that they make connections.
But the question is, as they transition, so if someone transitions from male to female, how are we measuring the fact that their brains have differences than people that were genetically...
It's an assumption that because they were exposed to...
So a male, because he has testes, he's exposed to male levels of testosterone in utero.
So the assumption is that their brain has been masculinized.
But it's a good...
Question because there's a lot of controversy around brain differences and whether there really are any.
But my understanding of that literature is that brains can be sexed by experts in humans with 85% accuracy.
But I don't think there is one really loud signal there that can be attributed to testosterone exposure in utero.
But the point I was trying to make is just that there are Are probably differences in the brain that were shaped during that organizational period.
In transgender people, so that we shouldn't necessarily assume that if they change their hormones in adulthood, that they will be sort of just like the other sex psychologically, because there may be other differences in their brain due to having high exposure to testosterone.
But I can tell you some of the differences that we then see once they transition.
I read something once, I don't know if you're aware of this, but a study out of, I think it was the University of Rome, where they were examining a link between promiscuous women and their offspring being male, having a disproportionate amount of gay men.
In their offspring.
And they were thinking that it was some sort of a variant in the X chromosome.
That there was something about the X chromosome that was leading them to be much more attracted to men than normal.
And that this is what led these women to be promiscuous and it led their sons to be gay.
So the findings link between homosexuality and female fertility strongly support the balancing selection hypothesis which suggests that a gene which causes homosexuality also leads to high fecundity or reproduction among their female relatives.
The researchers analyzed the personality and fecundity of 61 females who are either mothers or maternal aunts of homosexual men to 100 females who are mothers or aunts of heterosexual men.
Originally, the team thought the reason why the women who inherited the gay man gene might have more babies is simply because they increased androphilia.
What is that?
Or attraction to men.
That's it.
There it is.
Thus making the male inheritance homosexual and the female inheritors more promiscuous.
However, after analyzing the personal characteristics of 160...
See, here's the however that probably puts it in line.
Of 161 female maternal relatives of homosexual and heterosexual men, researchers changed their hypothesis and suggested that rather than making the women more attracted to men and therefore more promiscuous, the gay man gene appears to make female inheritors more attractive to men.
Okay, but females who are highly attractive, who have what we would call high mate value, tend not to be super promiscuous because they can get a high status, high investing male.
And you screw up that relationship if you're promiscuous.
Then you're no longer high mate value because your partner's going to question whether the offspring are his.
That's why I'm confused about how they switched, because it seems like they're 180 degrees from each other.
If sexually antagonistic genetic factors that introduce homosexuality in males exist, the factors might be maintained in the population by contributing to increase the fecundity, greater reproductive health, extraversion, and a generally relaxed attitude towards family and social values in female of the maternal line of homosexual men.
And this is not how all men are or how all trans people are, but this was the effect in the few months after increasing testosterone, sort of like a male puberty, which can feel overwhelming where thoughts of sex are overwhelming and that there's an intense need to kind of get some release.
And there's a way that these Trans men started viewing women, which was kind of alien to them because they hadn't looked at other people as sexual objects in that same way, but sort of a really intense need to get a release and seeing other women as vehicles for that.
I really don't want to overstate it and give the idea that trans...
I want to be careful about this, and I hope that I'm not giving the idea that trans men suddenly are objectifying women.
It's more that women, natal women like me, don't really understand male sexuality and that we think that men should kind of be more like us and respect everybody and why can't they just treat me like a human being instead of looking at me as a sex object, right?
So women get frustrated because men look at them as sex objects.
Right, but conversely, women dress very provocatively and still think that.
That they don't like that men look at them like sex objects when their cleavage is showing and they're wearing skirts and their legs basically have a vagina curtain on and their legs are hanging out.
It's very odd because they're obviously accentuating this.
Yes, but I think that women don't understand the effect that that has on men or trans men because they don't feel that same urgency, right?
And what I learned, I just was really interested in understanding what that's like instead of...
Shaming men for feeling that way.
I want to understand what that feeling is.
I really want to get it.
So talking to people who transitioned, who are natal females, who are then like, holy shit, this is what it's like to live as a man and have this sexual desire that was foreign to them.
So there was that piece of it.
That's a major piece.
It does soften with time.
So that's really just sort of the male puberty part of it.
And that's an intensity that females, I think, don't get.
But then there's this orgasm thing, which I thought was really interesting.
Orgasm apparently feels very different from the female orgasm, and people who transitioned talked about how their experience of orgasm changed.
And it can be feel insulting or hurtful for women when the guy is like, I'm out of here or I'm on to something else now.
So it seems that that so that full body feeling and the whole body being a sexual organ is a function of testosterone differences, because when for trans men, the experience changes from the full because when for trans men, the experience changes from the full body experience to a sharper, more intense, more acute, more time limited So it's more intense at the peak.
But this is consistent with the literature about sex differences in orgasms and sexual experience where it's more sort of acute and less concentrated on the whole body for men than it is for women.
And that's something that I thought was fascinating.
So the orgasm, but just in addition to...
What it's like sexually to be in the world and how you view the sex that you're attracted to and what the urgency is like.
As a woman, I don't really understand.
Obviously, I don't understand what it's like to be a man or have high testosterone or what it's like to be a man sexually in the world.
And that's part of why I'm interested in the hormone.
And aggression, interestingly, does not seem to—there's not good evidence that trans men become much more aggressive or that trans women become much less aggressive.
There are some anecdotal changes in anger.
And emotions.
So the emotional piece seems to be that—so I talked a lot.
I asked questions about emotional expression, partly because I cry.
I was telling you earlier, I tear up a lot when I am moved, and I seem to be moved all the time, and I can't control it.
I cry when I'm teaching, which is really embarrassing.
But I teach about what I think are really important issues.
So being stoic is masculine and having a lot of emotions and expressing them is more feminine.
Of course, again, this is a spectrum and there's lots of overlap.
But that also seems to be a function of testosterone.
So the people I interviewed described taking testosterone and then feeling that their emotions were blunted, they couldn't access their emotions, they stopped crying, and that anger was the only accessible intense emotion.
And there aren't big sex differences in anger in the first place.
There are large sex differences in physical aggression.
Like really fucking somebody up is more of a, you know, much higher rates of that in men killing people.
You know, that's basically all men.
Like serious physical violence where you put yourself at risk.
There's a large sex difference there.
But when you sort of move to the middle and you're talking about anger and you're talking about throwing stuff and pushing and hitting, there's not a huge difference.
There's a lot of sex difference there, at least in terms of- Lashing out with anger.
Interpersonal romantic relationships, too.
But that's another area.
But so the things that change in transgender people, the biggest thing is sex and sexuality and sex drive.
And then there's some evidence, a little bit of evidence about aggression, but that doesn't seem to be very pronounced.
What's always interesting to me that there's a lot of people that they sort of dismiss traditional gender stereotypes in terms of makeup and clothing and and then some of these people are actually not just dismissive of these stereotypes but they They seem to think there's something wrong with them.
They're insulting of these things.
They think that these things are in somehow or another holding back women or holding back men.
And what's odd to me is that it's celebrated in transgender people.
So whenever a trans woman is wearing a ton of makeup and short skirts and a lot of nail polish and big hoop earrings, everybody's like, you go, girl.
No one is ever looking at that trans woman saying, you are accepting these harmful gender stereotypes and embracing them.
And I think that's so complicated because if you have gender dysphoria, if you're really uncomfortable with your body and how it's sexed, and you desperately...
Go into puberty and you're horrified at how your body is changing because it doesn't represent how you feel.
Then I can understand how you want to adopt maybe a more extreme version of what you perceive the opposite sex to be like.
So I get it and I have sympathy for people who are suffering in that way.
But you're right that there is a sort of stereotyping of the It's just super complicated.
In the book, that is something that I write about at the end.
What I want for my son, here's where I start getting emotional.
It's really important to me that he feel free to express himself in whatever way he wants.
this is what I get upset about when I teach that there are these restrictive norms and people who feel different feel they just have to break out of that norm instead of feeling comfortable just being who they are with their bodies and you know I wish like that he could wear whatever clothes he wants and be accepted and
But there are these norms that we still have, and there is this confusion where women are stigmatized for being ultra-feminine.
But women have a lot of leeway.
Women can be super masculine.
We can be ultra-feminine.
It's basically fine.
Men have much more narrow constraints that they have to operate in because it's, you know, women are seen as the weaker sex.
So if you're a man and you are more feminized, even as little kids, you know, little boys who grow up to be gay are more likely to want to play with girls and play with dolls and wear dresses.
And they are bullied for that.
And they are tortured.
And a lot of those boys, I mean, some of those boys now are becoming transgender.
So maybe in some ways they're becoming very uncomfortable with their sex because it's an extremely unpleasant experience.
And then they end up feeling like they are the opposite sex because there isn't the leeway for them to just express themselves.
What I was getting at is that females in our culture are allowed to wear very little clothing at formal events.
Like if you go to a restaurant and the man is wearing a suit and a tie and a jacket, the woman will often be wearing this vagina curtain, long legs, all exposed.
You see her toes.
You see all of her feet and these strappy little shoes.
There's a long cut where her full arms are exposed.
Her breasts are at least half exposed.
There's cleavage.
I'm not criticizing this.
Again, I'm looking at it like an objective observer.
It's fascinating that you're saying that as females transition to males, they start objectifying females.
But females that identify as female and are attracted to men often dress in a way that would make them much more sexually, if not available, much more looked at like a sexual object.
This is not all of them.
I'm not generalizing.
I'm just saying...
You do not see very many men out at dinner with short skirts on where you see their feet and you see all of their arms and deep into their armpits and you see a deep cut in their chest.
It's odd, right?
Just as an objective observer.
Just looking at it like as looking at this species.
Because if a guy showed up in short skirts, short skirts where you could see big muscular legs and he had a tank top on where you could see his arms and this low cut thing where you could see his chest, that would be a masculine man that would be more likely to provide you with...
I think that the patterns of attraction differ in humans because it's adaptive for males to seek out females who have high reproductive value.
And our reproductive value has more to do with our physical health than if a female is seeking a mate, she wants somebody who's high status, who's healthy, but who can provide for her and her offspring.
On average, But these are the, you know, we have different mating psychologies on average.
And so for me, it's more important that I, yes, I mean, both sexes want partners who are healthy and relatively attractive and smart and kind, right?
So that's well established.
But there are these differences in which sex values physical attractiveness more.
And that's males value it more because it has more to do with female reproduction.
So females do better when they live a long, healthy life and they want to advertise cues of youth and health.
Respecting another person's intelligence and ability to handle the truth is so much more respectful than giving them information that might make them feel good.
And I don't even remember what your question was now.
So my perspective is that science is the way to get at the truth.
And I love teaching this class because I get a lot of students who are not scientists, think they don't like science, but they want to know about themselves and their bodies.
We don't just talk about sex and testosterone.
We talk about hunger and diabetes and energy and parenting and how hormones shape all these different kinds of behaviors.
And they love learning that.
And it's not stuffy.
It's fun and it's accessible.
And they, through science, they're learning about who they are and how they work.
And they find that tremendously satisfying.
So I'm going to tell a little story about Science and what it meant to me and learning about testosterone.
And that is, I describe this in my book.
And when I was a grad student, I, so I went to, I changed my career late in life.
And so I was in, gosh, I guess I was in my early, very early 30s.
And I I got accepted to Harvard and I felt like an imposter like a lot of people do.
You know, I don't belong here.
They made a mistake.
So I'll just back up and say That I was not a stellar high school student.
This is hard to admit to such a big audience because I teach at Harvard.
So I'm just Weston because I know that you lived in Newton or something.
I skipped classes and just had very little parental oversight and was kind of a party animal, but kind of destructive.
And so I ended up failing gym and English, which is ironic because I just wrote a book and I'm extremely athletic.
So I failed gym and English.
I just didn't go.
I just blew it off.
And I didn't know, which is a lesson because I have students at Harvard who are just totally freaked out about getting a B+. And I just feel like, I always tell them, like, look, you don't know where I came from and what you can change.
And, you know, a B +, a B +, is great.
And you're going to be where you're supposed to be.
Just, like, work hard and be disciplined, etc.
So that was my high school experience.
And then I went to this great college, Antioch College, but then I didn't know what I wanted to be.
But I graduated from college in 1988, and I was really excited about computers, which is so funny.
Computers were sort of fairly new.
And I wanted a job where I could work with computers.
So I just got this job in financial software.
And there was like 10 years of just doing this financial software stuff.
But I was just doing that so I could get my life together.
I really had a lot of growing up to do.
I just wanted to live on my own and be responsible and have a job and save money.
But I traveled a lot and I read a lot.
And then I figured out that I wanted to understand human behavior.
So I quit my job and I applied to grad school.
So that's kind of the long story about how I got there.
But I think you asked something about the background.
But so...
Oh, so, you know, I was going to tell my story of what happened, why I felt like an imposter.
It's partly because I didn't have the same background that my Harvard students have.
They were all, like, had their shit together from the get-go.
And they were, you know, had these habits that enabled them to be successful.
They were getting A's in high school and president of this and captain of that.
They're really mature, amazing students.
And that just wasn't me.
It took me a long time to kind of get to a place where I felt like I belonged and I'm probably still not there.
So I was in this seminar, this grad student seminar.
I think it was my first year at Harvard.
And it was the evolution of human sexuality.
And we were reading a paper on the evolution of rape.
And there was this explanation about rape in the scorpion fly and this implication that humans rape, men rape because it's an adaptation.
If they don't have the resources to acquire a mate, they'll just use rape.
And I had to comment on the paper.
It was my turn to talk.
And I was getting really emotional.
And I felt I was pissed off.
And I just was like, why isn't anyone else outraged here?
And so I remember just my eyes were watery and I was kind of angry.
And I said, this guy's an asshole.
Like the guy who wrote the paper.
And...
That wasn't, you know, an appropriate scientific response.
That was an emotional response.
And I will just say, if you jump forward, that kind of response now is kind of, seems to be in many places okay, that you're supposed to have an emotional response.
And if you do, then maybe we shouldn't have assigned that paper.
But I have an experience with rape, and...
So it was upsetting to me.
And I didn't want rape to be a natural part of human behavior.
I wanted it to be something pathological.
And so I was having a hard time analyzing the data, but the professor kept saying, look at the data, look at the data, look at the data.
And this, to me, was one of the most formative experiences because it helped me realize how important the truth is and that I can use science as a tool to get to the truth and understand myself and understand my life and understand even men or things that have been troublesome to me, even if it is painful.
And that pain is okay.
And I grew from that.
And I learned that I can use science to understand and ultimately it made me feel better and more empowered and more in control.
So my bias is like so firmly with the science and how important it is and how I was respected as a young scientist and given the truth and sort of really encouraged to look at the data and analyze the science instead of like give in to my emotions and believe what I wanted to believe.
I don't want to give anyone else like a line of bullshit about anything, like that the sexes are on a spectrum, you know, that there's five sexes because maybe that makes people feel good about being different.
You can feel good about being different even with the truth that there are two sexes.
That's okay.
You know, we can talk about that.
It's just confusing to be fed lines about science just because it makes people feel better.
It is what helped me go from somebody who was confused and had no direction and lacked confidence to finding something that works for me, finding something that's so powerful to explain the world.
And I love helping other people do the same thing and imbue in them a love for science and how powerful it is.
And I just feel like it's getting shat on.
Because I don't have a great explanation.
I think social media has a lot to do with it.
unidentified
What aspect of social media do you think accentuates it?
Because I thought that the features associated with sex, because they can vary so much, so sex is really about what kind of gametes you make or what your gamete plan is, whether you have large immobile gametes or whether you're going to be making...
Small mobile gametes, so like sperm and eggs.
That's really how sex is defined across the animal kingdom.
It's not chromosomes.
It's not sex hormone levels.
It's not body types.
That's not how you define sex.
Those are features that are associated with sex, right?
And those things do vary.
Even genitals vary.
You know, you can...
Have all these different combinations, right?
So I thought, I sort of wanted to see things that way because I wanted to validate people who are different.
Because I really do care so much about, identify somehow, I don't know why, with, I think, people who are different.
And I thought that that kind of validated people with differences.
And I have since learned that that's just not, it doesn't validate them.
It's just not true.
So I sort of studied it more and got more into the literature, and I realized, no, it's really about gametes, and I'm muddying this up to make me and my students feel good, and that's just not how it works.
I think I'm getting better at teaching what is now controversial information.
My students are saying that they appreciate having someone who's willing to talk about sex and sex differences and admit that there are two sexes and to explore how that works.
They're craving that.
But I think that...
Social media somehow.
And, you know, I hate to say it's a generational thing.
I think the academia spilled over into social media because people that were in school started using social media and then the people who are overwhelmingly progressive that run institutions.
I think I see things differently, but I think it's the wrong direction, and I'm scared, and I don't know what is going to put an end to this, but it seems to be getting worse and worse.
You know, my students are congratulating me for teaching just basic science now.
The social approval is great, and for sure people do that.
They virtual signal left and right online.
It's like one of the main activities on Twitter.
But the one thing that they happen to do while doing that is avoid the hate that you get from stepping on that third rail of, you know, when you step out of line and start saying things that maybe you actually believe but aren't a part of the orthodoxy, then you get hated on and piled on.
And that's why I wrote the book, because it's not just social media.
I have air quotes here.
It is the science that is coming out now about testosterone.
There are books coming out and there are even studies coming out that are...
Completely designed to show that testosterone differences are less than we thought, that there aren't really large sex differences in testosterone, that there's an overlap in testosterone that's just not that powerful and important, which means we can celebrate everybody as really being And sexless, you know, that there's no such thing as male and female.
Testosterone really doesn't do that much.
Or females have much higher testosterone than we thought.
And that just to blur the biological differences so that people, I guess the agenda is, so that people feel more comfortable expressing themselves and their...
Gender as they see fit, which I just think you should do anyway.
A huge issue right now, because I wrote about this in the book also, because there's questions about whether trans women should be able to participate on women's sports teams.
So the big issue is, well, does testosterone really confer an athletic advantage?
And I write about these examples where people are arguing that it doesn't.
Some people are saying that that advantage is cultural.
And it's not, and I outline in the book pretty clearly what going through male puberty and having high testosterone in puberty, how that changes.
I mean, you know you're jacked, and part of it's because you take testosterone.
And so you can speak from personal experience about the change in your athletic capacity and muscle volume.
It's all super clear.
There's no doubt that you have increased hemoglobin, you have increased muscle mass, you have a larger body size, you have increased bone strength, all directly a result of high testosterone.
And it doesn't all go away when you reduce testosterone.
It's a strange time when it comes to the reality of the differences between genders.
It's a very strange time because it doesn't...
No one's ever said men are better than women or women are better than men.
We're just different things.
And transgender people are different as well.
We're all just different.
We should be accepting of each other and loving of each other and give each other equal rights and laws and respect.
But when it comes to athletics, there's a reason why men don't compete against women.
And I had this bizarre conversation with this guy once who has this TV show where he kind of debunks things.
But when I got him alone to talk about these things, like without a team of writers, when you leave someone to just their opinions, And he had these sort of very progressive talking points that he would kind of blurt out.
But then when I started challenging him on these and going deep, he realized he didn't even really think about this.
He just wanted to appear that he was progressive, which I am.
I am a progressive person.
I know I look like a meathead, but I'm very progressive.
I just look at reality, though.
I grew up with martial arts and with fighting, and I know there's a fucking radical difference between males and females.
That, to me, you don't have to accept bad behavior.
You don't have to accept hurtful behavior.
But it does help us to really work hard to understand it.
And those are the extremes of behavior.
But you're right, we're different.
And I think it's interesting and it's exciting the ways that we're different.
And testosterone really does help to explain so many of those differences.
So understanding that hormone helps us understand each other.
And it helped me, even though I have been teaching about this stuff for ages, writing the book and especially reading about the transgender experiences helped me To have sort of this epiphany, so you can see how emotional I am, right?
I'm like ultra emotional.
My husband is a British philosopher and he is not, he doesn't get angry, he doesn't really express a lot, a huge range of emotion.
He's a wonderful guy and I love him, but I've always kind of picked on him and thought there was something wrong with him for not being more emotional, not being able to have these long conversations about emotions and psychology and what happened in his childhood to make him like that.
And I have a temper.
He doesn't have a temper.
I cry during lecture and can't even cry at home and can barely control that.
My epiphany was I'm not better than he is because I'm so in touch with my emotions.
I have issues.
He probably has issues too, but he doesn't have to come to be closer to me in my way of being in the world.
I need to work on accepting who he is.
He's an awesome guy.
And I was always trying to get him to be more like me.
And I think women really want men, if they're in heterosexual relationships, to be more like them emotionally.
But I had this epiphany like, no, it's working out.
And our marriage would be better if I just shut up about some of the getting him to be more emotional all the time.
I need to take the gifts that he's giving me.
And I have to look at myself and where my emotionality, which I'm getting emotional again.
But that was all through learning more about this hormone and what it does.
It's just who he is as a man.
It's not that all men are that way, but it did help me just the understanding helps us to accept each other.
And that's sort of one larger point in the book that I don't try to make so explicitly, but I hope that And again, I don't mean we have to accept bad behavior, but we can try to understand these extremes of male behavior that are disturbing and more disturbing than extremes of female behavior.
You know, I can cry and have a fit, but I'm not...
Raping anybody.
Well, because that's a bad extreme of male behavior that we need to understand.
But let's understand where that's coming from instead of shutting down the conversation or shaming men for just being men, who all men are being blamed for the extremes of male behavior.
But I think that's important in regards to everything.
It's important in regards to gender, to transgender people.
And if there's anything that upsets me more than anything, it's when I get misrepresented as being Either hostile towards transgender people or dismissive of transgender people.
And you're competing against females without letting them know.
If you wanted to tell them that you were male for 30 years and became female for two years and they still wanted to compete against you, we have no qualm.
I'm all in.
But that's not what that is.
When you say, I don't have to tell them because it's a medical condition.
Well, you could be furious, but would you use the same language knowing that people who are listening, they're not her, but they are people who feel like a woman and want to identify as a woman?
Is that even though I look like a meathead, like I said, I'm a very progressive person.
I'm very open-minded.
If I meet transgender people, I'm extra kind.
I try to treat them with the most amount of respect because I don't want them to feel bad.
That's how I feel.
But this is not one of those situations.
This was a girl who got her face crushed.
And I'm like, you're a fucking asshole.
You're not supposed to do that.
Do you know what sandbagging is?
Sandbagging is like say if we were in a martial arts tournament and you were like a 10-year Brazilian jiu-jitsu black belt, but you entered into this tournament and lied and said you were a purple belt and you started competing against people that only been doing it a couple years and you fucked them up.
That's what sandbagging is.
That was the general consensus for a lot of people how they felt about people that transition and compete against females in a lot of sports.
Without telling them.
But that's in martial arts.
In martial arts, I feel like it should be...
It's like riding bulls.
Do you choose to ride a bull?
You have a massive disadvantage against that bull.
I'm all for anything that people want to do where they understand the risks where they're getting into it.
I don't like deception.
When someone tells you that they're a biological female and they're not, that made me furious because I knew the story and I knew this one girl literally got her skull broken.
And I'm like, this is a person who's probably going to be injured for the rest of her life.
And from deception.
Like, had she known that this was not a biological female that she was competing against, maybe she would not have taken on that bout.
But now when it comes to sanctioned events like powerlifting, there's a giant issue right now with the Olympics, where they're allowing a transgender male, who's breaking all kinds of world records, compete...
It's not going to go away, but it doesn't mean people aren't compassionate.
There's a reason why males don't compete against females.
And this is part of the thing that I had with this guy, this TV show host, where I was telling him, okay, do you think that males should compete against females?
So my feeling here is that the way to decide these issues is not to pretend that natal males do not have any kind of advantage, or to To suppress discussion of that or to suppress knowledge about testosterone.
So I feel like I know what the literature says and there is an advantage.
Natal males will have an advantage.
But to me, that doesn't decide the issue.
I think there is a really, you know, there is a case to be made that if you are legally female, you should be able to compete as a female.
Yeah, but I think that the conversation can't happen when it's If we don't get the scientific facts out there, because people are so hung up on the science and arguing about the science that they're not even open to hearing the ethical case.
So let's establish the science, let's work with the facts, and then let's sensitively hear the ethical facts.
And consider that ethical case.
So even if there is an advantage, is there an ethical, philosophical case to be made that trans women should be able to compete against NATO women?
You might say no because there's a physical advantage, but at least we should get the facts out and then just sort of put the facts on the table so that we can have that conversation.
But that conversation isn't even happening.
So that people are closed off to what could be a decent ethical case.
Because maybe it's not all about physical advantage.
Maybe there's some human rights issues that people aren't even hearing or open to right now.
If you have a massive physical advantage, if a guy identifies as a woman and he doesn't want to take hormones and he wants to compete in women's boxing.
So imagine if you were a biological female and you're the cream of the crop and you've busted your ass your whole life through dedication and discipline to get to that point and you want to get a scholarship somewhere and you're getting denied.
No, if you're biologically male and you're competing against biological females and you have an extreme advantage, I don't think the ethics would lean towards letting you have this advantage because we want you to feel like you're female.
I think you should be treated like a member of society with all equal rights and equal respect and equal love, but we're not talking about being a member of society.
We're talking about competing.
If you're a 300-pound person and you identify with being a 100-pound person and you want to compete with the 100-pound people, that's not fair, right?
Well, if you're a biological male and you have all these physical advantages of being a biological male, but you identify with being a female and you want to compete as females, which is what we're seeing in high schools, where I don't think in some schools they're not even required to do anything.
Because if you are a biological female, you know there's a distinct advantage to having that testosterone.
And this is what they're dealing with.
It's ideology.
That flies in the face of science, and people are embracing the ideology because they want to be compassionate, they want to be progressive, and they don't want people to get mad at them.
Yeah, and I think you're right, and I think that's the problem.
And I think we should be able to have a conversation, which we should definitely be able to have a conversation, where you hear the point of view of the girls who are losing to the trans girls, hear their point of view, hear the point of view of the trans girls, and get the scientific evidence in and have The conversation.
That is not happening because it's being shut down because you're not allowed to say basically what you just said.
It might feel like you have to be in a third, if you're in a third league then you're not a girl and you want to be, I'm just trying to understand the other point of view.
I mean, look, this trans man, or excuse me, trans woman, male to female, is now in the Olympics for weightlifting and has a really good chance of winning the gold medal.
How many of them are going to be a footnote in this transition?
And this is significant when you're talking about people that literally dedicate a decade of their life that they can never get back, the prime of their athletic career.
You have 20 to 30. This is your window.
That's all you have.
That's it.
After 30, you can maintain for a couple years, but you hit 34. Ooh, 36?
Ooh, not so good.
The fucking extreme outliers can make it to the 36 and compete.
I'm saying we want to pay attention to the experiences of those trans people and what it's like for them to not be able to do their sport or to be relegated to some third team.
I'm just saying that perspective needs to be aired.
Can I change track a little bit and tell you a little background evolutionary basis of fighting and testosterone and then sort of ask about your experiences?
So I went to see this in Scotland, this population of red deer, because there's a lot of research on them and how testosterone controls their, this sort of unites their aggressive and sexual behavior.
And it's seasonal.
So there's these big seasonal changes in the red deer males.
And when testosterone is low, when there's no fertile females and it's outside of mating season, they live together in bachelor herds and they're relatively peaceful and they can hang out and chill and everything's fine.
When the females are fertile and it's riding season, The antlers grow.
So their weapons, testosterone creates these basically weapons that they can use to poke out each other's eyes and try to kill each other in the fight for females.
It gets their testes up and running.
It gets sperm made.
So it coordinates the ability to reproduce with the aggressive behaviors and the antlers.
So they signal to each other through roaring and through strutting around, and they have to make these decisions about who to fight and when.
And the most successful males will accumulate these harems of up to 20 or sometimes even more females.
So these really successful males are the best fighters.
And they have large, strong antlers.
They're at the right age.
They're in prime condition.
And it's testosterone that basically gets them to that place.
But what's amazing to see with my own two eyes was the way that they fought and how they are so tuned into the cues of the ability of whether they're going to have a chance against another male.
So some males are just roaming around the hillside with no females, and they're, like, covetously eyeing the dominant males who have a harem.
And so they have to decide if they're going to challenge that harem holder.
So they listen to the roars.
The roars are a really good sort of indication of what kind of condition that male is in right now.
How big is he?
Is he tired?
And they'll say run down the hill and then they do this thing called a parallel walk.
So they'll have a roaring contest and then maybe they'll decide to have a parallel walk.
They walk next to each other and then they back and forth, back and forth, just side by side, and they're sizing each other up.
And a lot of the time, one will decide, no, I'm not going to fight this guy.
I'm not going to win.
But it's this very formal thing.
They go through these stages, and it's predictable, the steps that they go through on the way to battle.
And if they decide to—if the challenger decides to fight—sorry, now I think it's if the challenger will— Lower his head with his huge antlers.
And then if the other one accepts, he lowers his head down and they lock antlers and they try to push each other down so that if one can get the other on the ground, he can poke him or he can try to poke his eyes out.
So they become very...
Violent and aggressive.
But what's interesting to me is human fighting.
And I haven't studied like the kind of fighting that you're interested in, but I was wondering, it's so amazing, first of all, to see in non-human animals, these parallels to human fighting when two males are Really trying to size each other up in terms of how big are they?
How threatening are they?
Are they tired right now?
Are they strong?
Are they experienced?
And what is the motivation like for you or for your fighters?
What is that motivation to want to just kick the shit out of somebody?
And how do you make the decisions on the road to battle?
And it's obviously not because you're going to take over somebody's harem.
So what is it that's at stake when...
What is behind that motivation to fight?
And what do you feel like is at stake?
Is it status?
Is it reputation?
And there's a lot of evidence that testosterone upregulates dopamine in different contexts, like sexual contexts and aggressive contexts.
So I think it's also...
Just rewarding to engage in battle, maybe for males in a way that it's not for females.
So I just wanted to hear a little bit from your perspective about, from a male perspective, a man's point of view who's really into fighting.
If you can see any of those parallels with non-human animals.
There is fighting, meaning competing for females where men puff up or men go to the bar and they fight with other men and there's a big difference between that.
There's a big difference between that and competition.
What competition is, is high level problem solving with dire physical consequences.
And the reason why people are attracted to people that do that is because they know it's a terrifying endeavor.
Because you're risking your emotional health, your physical health, your self-esteem, you're risking it all at the chance of being a conqueror, at the chance of being a champion.
And it's a very rare position because only one person can hold it in each weight class.
And so the extreme of the extreme in terms of people who, and a lot of them, you wouldn't even, especially in jujitsu, you wouldn't even imagine that these would be the people that would do that because they're just really intensely intellectual people.
I always call them like nerd assassins because they're just really super smart people that are absolutely dedicated to trying to figure out this puzzle.
They're playing a game of human go or human chess.
It's not what people think about it when they don't engage in it.
People look at it like it's brutish.
It's like two deer.
Just trying to compete and jab each other's eyes out.
It has nothing to do with that.
It has nothing to do with that.
It has to do with you're trying to figure out a way to get better at everything in life.
You're trying to reach the maximum of your human potential and that's what fighting does.
What fighting is, it's a vehicle for developing your human potential.
With every improvement, with every success, with every setback We have to regroup and relearn and then reassess all the parameters, reassess all the dangers and the risks and all the pros and cons, all the things you did wrong, all the things you did right.
Were you 100% disciplined or were you only 80?
And if you were 100, would you have won?
What if you slept more?
What if you got more massages?
What if you stretched more?
Would you have won?
What if you stopped hanging out with girls and drinking with your friends and doing this and doing that?
Would you have won?
And the winners do everything right.
And it's so hard to do.
It's so hard to do.
And you have to have everything in line.
The winners have all the things.
They have the genetics.
They have the mental strength.
They have the technique.
They have the experience.
They have all the things.
And it's such a rare combination of traits and attributes and experiences.
And they all come together.
Under the bright lights of thousands of people watching.
So you have the intense pressure of you looking across the octagon or the ring at another human being that's in the same thing.
Where you've prepared for weeks and weeks and weeks for this one moment where the referee looks at you.
Are you ready?
Are you ready?
Let's go!
And then it happens.
And then you have to be in the moment.
You have to be in the moment.
You have to be able to Exist and be mindful in the middle of chaos, in the middle of someone with massive amounts of kinetic energy and training, hurling their bones in your direction with the object of knocking you unconscious, which is totally possible.
You know it's possible because you've done it to other people, and you know it can happen to you.
Maybe it's happened to you before.
And so you have to put that aside, and you have to think about defense and offense, and you have to try to be in the zone.
That's what people are addicted to.
And it has nothing to do with those stupid fucking deer.
Those stupid deer that are going sideways.
They get to fuck once a year.
It's a terrible life and they're probably going to get eaten by mountain lions.
It is in some way, but it's a status that's achieved by accomplishment.
It's not about the status as much as it's about the accomplishment.
It's about figuring out how to do this thing and also how to do it against someone who is not just a professional, but an elite professional.
Like this weekend, this weekend, I'm going to Phoenix because Marvin Vittori is challenging Israel Adesanya for the UFC middleweight championship of the world.
And it's an intense fight because they fought a long time ago.
They fought like four or five years ago and it was a really close fight.
And now they're going to talk shit to each other and they're going to go at it.
But these are two elite super athletes.
In the prime of their career, and in Stylebender you have probably like the slickest, most intelligent, most technical striker that's ever fought in the UFC. And then in this guy Marvin Vittori, you have this fucking Italian savage who's just like this really good brawler, who's good at everything.
He's good at wrestling, he's good at ground and pound, his striking is solid.
That's this weekend.
This is...
I'm telling you, the moment that happens Saturday night, when I'm sitting there, and it's me and Daniel Cormier and John Anik, and we're calling the fight, and we're sitting there cage-side, and we're just, holy shit!
It's wild, but what's wild about it is, first of all, for me, There's a tremendous honor in being able to give words to this experience and try to make it exciting for people watching at home and to let them know that, you know, as much as I've seen in this life, as much as I experience in this life, I'm still enjoying this as much as they are, if not more.
And I want them to feel that.
I want to accentuate their experience.
And for the athletes that are fighting, I want to...
I want to explain it in a way that honors what they've done.
I want to explain it in a way where when it goes down in history, they can watch that videotape and they can get fucking pumped up hearing the things that I'm saying.
Because I was worried about brain damage and there was no money in it.
And I was definitely getting loopy.
There was something going on.
What I'm interested in when I'm watching these things is when I see a guy like Stylebender, one of the elites of the elites, I know how insanely hard it is to be that guy.
There's only one of him.
Do you understand?
There's like millions of people doing martial arts.
Millions of people watching the UFC. There's one stylebender.
There's one 185 pound champion.
And when he walks into that octagon and raises his hands and everyone goes, fuck yeah!
Because they know that guy has gone through a journey, like an insane journey to be who he is.
It's not easy to be that guy.
You have countless days of training when you don't want to, the discipline, all the fucking physical preparation that's involved.
All the strength and conditioning and all the sparring sessions and all the chaos that's involved leading you up to that fight.
Watching your diet, the nutrition and supplements and everything and studying tapes and going over techniques with the trainers and keeping the mind on point.
Not letting the demons of doubt enter your mind and fuck with your psyche.
It's really intense and I didn't understand because, you know, in my life I work hard.
I try to improve myself and I feel like a lot of people who are really driven that way have some demons or something they're trying to prove or overcome.
And maybe what you're doing and what you're involved in, you know, because I asked you, couldn't you just, Do rock climbing or write a book or play chess.
Obviously, I feel like I'm taking a risk writing a book and putting it out into the world, but it's not going head-to-head directly where you have to always...
Some people have a calling not just to rock climb, but to free solo like Alex Honnold.
I've had him on several times.
I'm amazed at him.
And he's so calm.
One of the things about Alex that's so interesting, he's so nice.
He's so calm and sweet.
He's like the sweetest guy.
He's so nice.
And he's very boyish.
In his charm and the way he carries himself.
His eyebrows are always raised.
He's literally one of the most courageous people alive.
Not only does he climb these fucking mountains without ropes, but he establishes paths that That have never been established before and that's part of the thrill for him is to free solo these places where sometimes he's hanging for his life on like a two inch lip with his fingertips and then he wedges his hand and these rocks and he pulls himself up slowly and he's hanging on this and then Oftentimes he's at angles, right?
So he's not even, there's not even a 90 degree angle.
He's at angles where his gravity's pulling him down and he has to make it up this ledge and he has to follow this path.
I mean, that's kind of similar in a lot of ways because he's recognizing that what he's trying to do Is so difficult that a mistake equals death.
Maybe that's the most challenging of all the pursuits.
Maybe that's the most.
But it's different.
His mindset, as I talked about before...
We're looking at the human race as a giant puzzle, where every piece is important, but every piece is different.
But it's something where he's pushing himself to the absolute limit and drawing strength and lessons from that.
So I have an example that I hesitate to bring it up because it just completely pales in comparison, but for me, it's really meaningful.
And I just mention this in the book, but just running a marathon.
I ran two marathons.
I ran one when I turned 30, one when I turned 40. And I couldn't...
I got injured in training for the one when I was 50, which is why we have age classes, right?
Just like sex classes.
You're not the same person.
But when I talk about that sometimes, I feel like doing even just one marathon...
I draw on that experience more almost than any other when I need strength sometimes and when I need to get through something.
I recall feeling like I couldn't go on and what it took, you know, all the training, like a marathon's great because what you put into it is what you get out of it.
It's not luck.
It's just work and discipline.
And just the lesson that you teach yourself when you push yourself till you feel like you can't go on, and then you go a little bit...
But for me, it's that experience of really pushing yourself and figuring out how to do it and having people support you.
So the reason I even applied to Harvard Graduate School was because somebody believed in me.
You know, I had...
Someone believe in me, even when I thought, like, this is a dream, I could never do this, blah, blah, blah.
Someone believed in me and pushed me to work and do the work.
And I, you know, I think you get the same.
So just hearing you talk about mixed martial arts, it is emotional.
And I didn't understand, but I get it a little bit just because of my experience with marathon, where it teaches you so much.
And it's something you can draw on your own strength and your own discipline.
You know you have it.
What it takes maybe to get through all kinds of other situations.
It really does translate to the rest of your life and that when things are hard, you can press on, especially if people are supporting you and applauding you and believe in you.
Just like when someone gets caught doing steroids, just like when someone gets caught using EPO. And we're going to have to deal with a bunch of these things coming soon in the future with CRISPR and with genetic editing and all the stuff that's going to come down the pipe in 10, 20 years with new athletes that are coming that have been literally genetically altered.
We're going to have to reassess what's important and what's not.
We're going to come to a point in time where transgender people don't have to concern themselves with the differences between biological sexes because they will be biologically different.
That is my ultimate hope.
I don't have any...
Hateful thoughts about transgender people.
My thoughts and concerns, and one of the reasons why this all came to light, was all about competition.
And unfortunately for me, it wasn't just casual competition.
If it was competition like running, I'd probably be like, that's kind of fucked up.
But it's this, which is a part of my DNA. This is a part of who I am as a human being.
It's been a giant part of my life.
Martial arts changed who I am as a person.
It changed me from a loser to someone who had confidence.
Well, that's what it's all about when you get a really arrogant professor who doesn't want to listen to the children, who doesn't want to connect with the kids.
And so I lived in New Jersey until I was 7, then San Francisco from 7 to 11, and then Florida from 11 to 13, and then Boston from 13 to 24, and then New York from 24 to like 26, 27-ish.
I was back and forth.
And then L.A., yeah.
So I lived in a lot of places.
And because of that, it made me formulate my own opinions on things because I didn't have the opportunity to have a conglomeration of opinions that I could adopt as my own from my friends that I grew up with.
But we all agreed, you know, we're all right wing or we're all this or we like the Green Bay Packers.
I didn't have any of that shit.
So I had to look at things from my own perspective and try to figure out what...
And I would see things in people and go, well, that's kind of fucked up.
And see things in other people and go, man, I wish I was like her.
And these kind of interactions shaped me.
But until I found martial arts, I was ruthlessly...
But I thought I was a psychopath because all I wanted to do was fight.
And my thought was like we would all go to these tournaments.
We would travel either by airplane or we'd travel all over the country to compete in these tournaments.
We'd fly to Ohio and California and all these different places.
And everybody was so scared.
It was so scary.
Because you'd see your friends get kicked in the head and knocked unconscious.
It's really freaky.
Especially when you're young.
And so it was like gallows humor.
I would make fun of everything.
So I would do my impressions of my instructor having sex with one of the other students.
I would just try to make everybody laugh.
And then he pulled me aside and he said, I think you should be a comedian.
And I was like, you don't...
I go, you think I'm funny because you like me.
I go, but other people are going to think I'm an asshole.
Because our comedy is crazy person's comedy.
It's savage comedy.
Like, we're crazy people.
We're choosing with no money on the line.
There was no...
Career in this we're choosing to fly and spend your own money to fly across the country To try to kick someone in the face who's trying to kick you in the face.
It's a crazy thing to do and but By making the team laugh like I would make them laugh.
Yeah, I'd make them laugh in the locker room like we were about to spar We're putting cups on wood laugh.
Yeah, and so that's how I became a comedian.
I became a comedian through fear and Because comedy was a release valve for something way scarier.
Because for everybody else, comedy is really scary.
Getting on stage is scary.
But the only thing scarier is getting kicked in the liver.
Here's the real question like what are we really trying to do because I think what we're trying to do whether you take apart Human sexual interaction transgender people gay people straight people Sensitive people aggressive people.
What are we trying to do?
We're trying to get through this thing and With the best, the most good feelings and the least bad feelings.
We're trying to get through this thing and figure out what it is.
And there's a lot of ways to do it, but ultimately we're kind of working together And we don't really communicate all of the real insecurities and the real emotions and the real problems involved in this.
And instead, we sort of fortify our tribe.
And we, you know, we fortify our positions and we get aggressive about our stances on things.
We fight against people who disagree with us or differ from us.
We don't realize that often we're fighting against ourselves, especially when it's not important.
The best strategy is to just communicate with openness and kindness.
And we don't do that very often because we're scared.
And that is a battle in and of itself.
That's another kind of fight.
The fight against your own emotions, the fight against your own insecurities and your own fears and your own, you know, the importance of camaraderie and love.
And I was saying that I felt, you know, I feel when I'm teaching and someone advised me not to get emotional when I do interviews or come on Joe Rogan because it will discredit my authority.
And in teaching, I do worry that it will discredit me because I'm not as much of an authority, but I've thought about it a lot.
And it's really, it's just perceived as masculine, not to get emotional, to sort of keep your emotions in check.
And masculine is perceived as the authoritative sex.
So I'm trying to own it and say that, you know what?
It's hard for me to own it because it's embarrassing to me.
But I feel like this is the way I am.
I am a woman.
And I also know what I'm talking about.
And I'm also authoritative.
And students are responding.
They feel that somebody who's open and real It creates a trusting environment for them to open up to new ideas.
So that's just a different way of doing something.
And maybe it's a low testosterone way.
But the way you're being right now, you have a shitload of testosterone.
That is obvious.
And you're so open and raw and emotional.
And I love what you're doing.
And I love what you're talking about.
Yeah.
It's a great sort of, you're exemplifying how sex differences work.
You're totally jacked and strong and like, you know, maybe beating the shit out of people, but you also have a huge heart and a really emotional, and that's, you know, there are some differences on average there, but there's so much variation, and that's my whole, what I really try to In the book,
T, I'm just going to say the name of it, the story of testosterone, the hormone that dominates and divides us, I'm trying to show how understanding each other can promote the values that you're talking about.
By understanding this hormone, we can understand each other and hopefully accept our differences.
So if you're sparring, what it is is like this open-ended, it's almost like a conversation of techniques.
It's like you say this and I say that.
Helson Gracie, who's a very famous jiu-jitsu instructor, he's a part of the greatest lineage of all jiu-jitsu, which is the Gracie family.
And he said, this is jiu-jitsu.
He's like, I say this and you say that and I do this and you do that forever.
And this is his thought, but it's like I move this way and you counter that way and we keep going until one person gets stopped, one person gets tapped out.
In doing that with each other, you learn about each other and you learn there's other people like you and you learn there's a whole tribe of people like you that also are trying to accomplish these great things and figure out themselves and optimize their human potential through martial arts.
But this guy and I, we hadn't talked for a long time, but every time we'd see each other, we had this weird connection because we fought together all over the country.
We'd travel and...
It was a weird bond, you know, like we trained together.
But these bonds are through experience, and it's through the experience of difficult things.
There's so many people in this life that are looking to retirement.
They're looking to getting out of the game, and they're looking to all these things.
There's a thing that's happening with all of us.
Where we're trying to figure out ourselves and we're trying to find truth.
And you seek truth through combat.
You seek truth through these very difficult things.
But also through marathons.
Marathons is combat.
When you're telling me about marathons and about how you develop strength from those experiences and it applied to your regular life, that's a combat between you and your mind.
But can I just say one thing about, I want to just say something because I was just reminded of like, so I use the bike to prevent depression, right?
I just want to say that that's in my nature.
I have a genetic predisposition.
I have it on one side of my family.
And I write about this in the book.
Because a lot of people, if I'm writing about testosterone and saying it promotes X, Y, and Z, they're like, well, you're justifying male aggression and you're justifying rape.
Discuss the effects of, say, genes on behavior, then it implies that that behavior is immutable, that then we're fucked.
Then we're just going to be stuck with aggressive males who justify their aggression by saying that it's in their genes or in their hormones.
In their biology, right?
So it's bullshit because you can have a genetic predisposition to lots of different things.
There are things that are in your nature, like I do with depression.
But there are things that I can do in my environment.
There are ways that I can create my environment, so I keep that at bay.
But I know that if I let up, if I stop paying attention to it, or if I can't exercise or eat right or whatever it is, or do my fulfilling work, that it will come back.
The reason why they're doing this is because they're not talking to you.
It's an ineffective way of communication.
You're talking in a way where you're writing things down in a vacuum.
And you're talking to someone who doesn't get to...
If they sat in front of you, they would never think you're justifying rape.
This conversation that they're having where they're just typing things out alone in an office and then they send it out through the internet on a fucking blog post.
The best way to express themselves in that way, if you're going to be accusatory, is to communicate with someone.
Because then you get an understanding.
And you would say, hey, do you think that rape is justified because of high testosterone?
You're like, no!
No, that's not what I'm saying.
We're just talking about, like, look...
If we go back 100,000 years ago, what the fuck was rape about?
200,000 years ago, let's look at chimps.
Let's look at higher primates.
Why is it happening?
What is it?
What's causing it?
It's obviously negative, but what is it?
And then they would go, oh, okay.
If they were honest and they had personal sovereignty, they could communicate about you objectively and honestly.
But the problem is how few people have been through the fire.
We got a lot of weak ass people out there that are out there casting aspersions and pointing fingers at people where they don't point them at their selves.
When we were talking about this before, one of my takes that I've always had is if you get 100 people in a room, how many of those people are going to be fucking idiots?
At least one.
You got one idiot.
So you got 300 million people.
You got 3 million fucking idiots.
That's a lot of people on Twitter.
That's a lot of people jibber-jabbering and they don't have control of themselves and they're on a fucking handful of SSRIs and trying to figure out what's wrong and trying to self-actualize and yet they're shaping culture at the exact same time.
And part of the problem is they're not with other people.
I didn't like the whole, I guess I am going to inject politics, but the sort of shaming of Trump voters.
Instead of trying to understand their point of view and where are they coming from and what shaped their political opinions, what are their circumstances, instead of just sitting back and saying, I'm superior to you, you're a piece of shit, I'm not even going to ask any questions.
Well, he was uniquely problematic, and I think this is where this works out.
The problem is we want a quick fix to all the things that ail us.
And I think that with a guy like Trump, the people that were on the left that found him abhorrent and they found his policies and the way he discussed things disgusting, What they're doing is signaling to the people on the right that here's all the problems we have with this one individual's approach.
Maybe there's some merit in some of his fiscal decisions, and maybe there's some merit in some of...
When more things come down about China, maybe there's some merit in the way that he deals with things with international business.
I think we're going to reach a point where we're so fucking confused we're going to let Elon Musk drill into our head and put some fucking wires in there and put that neural link in there and we're going to have an elevated state of consciousness through some symbiotic relationship with technology.
I just think that there's going to come a point in time where it's going to be unavoidable, where technology surpasses our personal current capabilities.
And I think that's one of the best ways.
To figure out intent, right?
Because so much of this stuff that they're doing when people are talking shit about people and people are mad about people, it's like, what are we doing?
Well, you're trying to label a person without that person being able to respond.
You're shaming a person and boxing a person into some deplorable category, into some unredeemable category.
Like, what are you doing?
Like, what are you doing?
You're trying to paint someone in a way.
You're trying to describe them in a way that they can't get out of that box.
I mean, do you think it's just going to heat up and institutions are going to keep capitulating to the vocal minority and I'm going to be out of a job maybe because I said that they're male and female?
When I found out about that, I'm like, that is insane.
He's one of the proudest people I've ever had on my podcast because I've always been a giant fan of his.
And just to be able to sit and talk to him and listen to the way his brain works and the fact that he's been doing this and he's been involved in the civil rights movement for fucking decades and decades.
The contributions that guy's made.
And when you find out that guy didn't have tenure because he criticized Israel, or he has controversial views on Israel and the Israel-Palestine crisis, you're like, what?
So I sometimes feel scared teaching about controversial topics, but I believe that it's really important to do what I feel is right and to teach the science as I understand it.
And so I work really hard to try to understand the truth and to convey that to students.
And I brought something with me because I asked on our final exam, one of the questions at the end of the final exam was, how did this course change you or something you believe in, and what was the evidence that led you to change your mind about some issue?
Because it was so moving to me, and I think it shows the value of telling the truth and how important it is and that we not capitulate.
Something that I learned in class changed my attitude and assumptions surrounding genetic differences of sexual differentiation and the naturalistic fallacy.
So I'm just going to say that the naturalistic fallacy, do you know what that is?
After many years of therapy, I'm in a better place, but I never stopped feeling that something was wrong with me until this class.
When I told them, they actually brought up what I now know to be the naturalistic fallacy.
They told me that what I was doing was not found in nature and thus it was wrong and was shunned.
Even though I never believed, okay, blah, blah, blah, blah.
I've always believed that people are people and that everyone has the autonomy to live the way they want despite what anyone else has to say about it.
But I never understood the biology of why people felt like they were born into the wrong gender or didn't fit a mold.
But learning about all this really opened up my mind and made me feel for people who don't feel like themselves in their own body, even though I've never experienced what they are going through.
Gender and behavior is not as simple as external genitalia at birth or genotype and I really appreciated learning about these topics not only for the sake of others but also for myself and my sanity.
So I just wanted to read that because I think it's just a testimony to the truth and what it can do for people and that we need to stand up for the truth and not We're good to go.
Learn how to learn the truth and how to critically evaluate evidence, how important that is to them.
And I just want...
I guess I'm just making a plug for standing up for the truth and not thinking that it helps people to just tell people what they want to hear or...
Pretend that sex isn't real or testosterone doesn't matter or that genes don't matter.
Environment and culture matter too, but it all works together to produce the variation that we see and that we have.
And it doesn't mean we have to celebrate anything.
You know, it just means we have to understand how it all works.
But using science or art or whatever else as a tool, but let's not distort the science.
LOL. You know, one of the things I wanted to bring up is that, you know, in ancient Native American cultures, transgender people were revered because they could look at things from both sexes.
Yeah, like they there's a famous battle the Fetterman battle with the look there was a Lakota transgender person who They thought him this person as a visionary because they could see things as both male and female perspective and And they had a word for it.
I can't remember what the word is.
But this person recognized that there was this place that they should go to have this battle and they had a vision.
And this vision was that they were gonna conquer these white soldiers and that they did this thing and they came back and they said there'll be 100 bodies.
They wound up killing like 80 soldiers.
They tricked them.
They had like 10 Native Americans.
It's on this podcast, the Meat Eater podcast that my friend Steve Rinella has and it's a really interesting story.
This guy talks about how they set a trap and these 10 Native Americans led these soldiers up and they wound up killing them.
What's interesting to me is there was like 10,000 people waiting for these soldiers and they all killed them.
At that point in time, it was a suicide run.
They had realized that the end of their way of life was pretty much there and that these white settlers had made their way across the plains and all the way to the Pacific Coast and they realized that This was it.
And that coincides with the Battle of Little Bighorn and a lot of the other battles that went on.
It's like these are the last gasps of the Native American empire that existed in this continent.
But the way they looked at Native Americans, the way they looked at rather transgender people is fascinating to me.
They looked at it as a very valuable member of the society because a person who could look at things from both a female and a male perspective.
They didn't look at it like, oh, he's a sissy.
He likes dressing up like a girl.
Or, oh, look at her, that bull dyke likes wearing men's pants.
Well, it's hard because also you don't want to be – but you don't want to – right.
Sorry.
I mean, you don't want to – I want – the goal for me is to – Consider, obviously, be sensitive to people's feelings and their identities while being accurate about the science.
So I chose natal, male and female, because saying biological male, to me, somehow sounds harsher to the person as a trans woman, say.
I'd rather just say, this is what you were at birth, and now you're something different.
I should just say, I have a chapter in the book on the source of the male advantage in sports and how testosterone shapes the male advantage, and it's totally clear how it works.
Well, there's been females that have taken, especially in mixed martial arts, there was a Wild West period where you could kind of do whatever you wanted.
The UFC started in 1993, and female MMA didn't start until the early 2000s.
Well, there was like some female MMA, but like early 2000s it started to come out, and there was a few that were like juiced up women, like women on a ton of testosterone, who developed voices like this.
You hear them talk and you're like, No, it's hard because for detransitioners, that's very, very hard to want to live as a woman again, but you have a male voice.
And there was a real problem with some of the females that were competing in MMA because they were competing against, they were like natural females who were competing against jacked up females.
I've heard more than one of them that started off as a male and then transitioned and continued to compete as males.
And the problem was, I'm sure that some of them have competed as females as well, but the problem was some of them were elite as males, but they identified as female.
They're far more acceptant of transgender people in Thailand for whatever reason.
One of them that I know of is a fairly infamous one where he was elite as a male and then switched over and became female and unfortunately After getting castrated and getting the surgery and losing his testosterone and becoming a female, then she started losing because she was competing against males without testosterone.
Can I just say something about gay and testosterone that I think is interesting that's in the book, which is a lot of people think gay men are feminized and that they must have had lower testosterone at some point.
I'm assuming, you know, when you see brass poles and dudes throwing money in the air, I'm assuming there's sex involved.
It's just, there's a bunch of freedom.
There's a different sort of, you know, One of the cool things about gay men in particular is they find these neighborhoods and they dominate these neighborhoods with other gay men.
And I have a joke about it that lesbians never really get a chance because they move in and straight guys find out and they go, I'm an ally, and then they fuck up the neighborhood.
I mean, there is some feminization of behavior in that gay men, as kids say, were more likely to have more feminine interests and have some more feminine interests in adulthood, but it has nothing to do with testosterone.
Because this is how human beings, as oddly as it seems, and I don't know how I stumbled upon this accidentally, human beings are supposed to have conversations with each other one-on-one, undistracted, where you get to feel how that person actually thinks and feels.
And you don't usually get that in real life because they're checking their phone and they're talking to other people and there's a lot of activities involved and you're moving around and there's ideologies that come into play and there's cultures that come into play and there's all this pressure and influences.
And there's something you might have said five years ago, one thing you might have said that pisses somebody off and they're not going to listen to anything else you said and anything else you said is bullshit because you said maybe one thing five years ago that was offensive.
I mean, that's an incredibly difficult path to be on, and it takes an amazing temperament and personality and character, and luckily Daryl has those things.
Because music brings people together who might disagree and not even like each other, but they're all getting down to the same rhythm, and that's pretty incredible.
Also, Daryl grew up overseas and came to America when he was young, and then he was attacked for his race, and he didn't understand it.
He would talk to his parents about it.
He's like, what is going on?
He didn't understand, because overseas, he was...
Where was he, in Italy?
I forget which country that he lived in, but when he came to America he didn't understand racism.
So all of a sudden he's dealing with this.
He had developed as a human being up until I believe he was 10 or 11 years old when this started happening.
I don't remember.
He might have been a little younger than that.
But the idea was that it was so stunning to him and so stupid that he's seeing grown adults behaving this way.
And he's like, okay, there's got to be something.
So when he was finally doing his music and he ran into this guy, the story was, He's talking to this guy and the guy's like, you know, I never had a drink with a black guy before.
And then, like I said, three or four months into their friendship, that guy gave up his position in the KKK. And how many people did you say?
More than 200. That's incredible.
Neo-Nazis, and he goes out and he meets them, and he's so nice.
When you meet Daryl, also, he's so brilliant.
He's so articulate and intelligent that when you talk to him, you can't imagine that he's inferior, because he's just too smart.
So it's like, hmm.
You're trying to find holes in this game, but those holes don't exist.
But this is the power of one-on-one conversation.
One-on-one conversation is the only way people are supposed to talk.
The worst aspect of human communication is through text anonymously.
And that's what you're seeing through social media.
And that's unfortunately shaping the zeitgeist.
It's shaping culture.
It's shaping the way we think about ideas and issues and people.
It's not real.
It's not how people are.
If you talk to each one of those individual people with real issues, got together with nothing to gain or lose, and just talked in a room by themselves, most of these things would work themselves out.
And if they didn't, it would be clearly illuminated to anybody observing that one of these people has a deep emotional problem.
One of these people doesn't live in reality, or one of these people is unnecessarily aggressive, or whatever the fuck is wrong will be illuminated.
I mean, don't you see people when people are out to dinner and couples are both on their iPhones or even, and if you travel to other countries, I'm not going to say which ones, like everyone's on their phone all the time, wherever they are.