Dr. Marc Breedlove

All right, now we're at 3.5.

It turns out you got to have like a dozen older brothers just to have a 50-50 chance from the same mother.

We'll get to those in a moment, but this is what you see.

So you get a big population of men.

Here's a big population that have one older brother.

How many are gay?

And it's a small number.

And the number they have two, still a small number but more.

And how do you explain that?

We saw it when we did the surveys.

I don't know if you remember.

We also asked people how many older brothers and sisters they had and how many younger brothers and sisters they had.

So it turns out in the general population, there are about 105 boys born for every 100 girls, right?

That's also very consistent.

That's right.

Or put it another way, if you want, I can guess the sex of any baby that's going to be born, and I can be right more than 50% of the time because I'm always going to guess boy, right?

Because 51% of the time, it'll be a boy.

For straight men, you total up all the older brothers they have and all the older sisters, and there's a ratio of about 105 older brothers to 100 older sisters.

For the gay men?

It turned out there were 140 older brothers for every 100 sisters.