How Hormones Shape Sexual Orientation & Behavior | Dr. Marc Breedlove

The larger the number of older brothers that a male has, the higher the probability that he is gay. It's been seen over and over. I mean, it's it's really one of the uh rock solid findings in human sexuality. So the way to emphasize the difference is if a baby boy is born today, um if if he has no older brothers, his odds of being gay when he grows up is about 2%, right? Pretty low.

But if he had one older brother, his odds go up by a third. Okay, 2.6. And if he has two older brothers, they go up a third again. All right, now we're at 3.5. It turns out you gotta have like a a dozen older brothers just to have a 50-50 chance.

Welcome to the Huberman Lab podcast, where we discuss science and science-based tools for everyday life. I'm Andrew Huberman and I'm a professor of neurobiology and ophthalmology. At Stanford School of Medicine. My guest today is Dr. Mark Breedlove.

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