Dr. Marc Breedlove

they can adopt and things like that.

And so they're very much feminine, very straight women.

But they're XY.

But they're XYs.

So the question is, unfortunately in terms of understanding whether prenatal testosterone alters our sexual orientation, these individuals aren't useful to us because we don't know if they're straight women because their brains could never respond to the prenatal testosterone

Or are they straight women because they were raised as girls and socialized to be attracted to men?

It's a fascinating syndrome.

And there's at least one woman with AIS who's self-identified, who's a successful model.

And there's another woman who wrote a memoir that's quite good.

And what's interesting about it, when there's no testosterone response, they have very feminine faces, very feminine bodies.

And so there are...

frankly quite attractive as women.

It's been seen over and over.

I mean, it's really one of the rock-solid findings in human sexuality that was first noticed by Ray Blanchard at Toronto and has been seen in many populations all over the world.

So the way to emphasize the difference is if a baby boy is born today,

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.