I'm not sure what you mean by this, but I'll give you the benefit of the doubt for the moment.
Biology. One mom, one dad. That's the way it is. Homosexuals might get their hands on a kid to raise, but the kid came into the world the heterosexual way. So his parents had to be heterosexual for at least the moment of his conception, even if lesbo mommy had to go to a sperm bank to do it.