I predict that mostly gays are from western countries.
I think thats just because gay ppl in western countries are "visible" to others. In other countries gays don't tell that they are gay and live in a heterosexual relationship because they fear reprisals.
If gays would have right to adopt kids, these kids growing in gay family can understand it as normal thing and and they can become to be gays.
Science don't have a real answer to the question why and when someone become gay. But I don't think that more ppl will become gay because they have same sex parents. I mean most gay ppl were raised in heterosexual families
