Oh yeah, in Norwegian we call it 'Arv og Miljø'. I am a big believer of that.
Well, the whole gay thing is just annoying imo. the fact that it is a legit problem a lot of places is just annoying. lol. And yeah, I don't think that is something one is born with. (Maybe a little), but rather that ones environment does all the work.
In my case, for example: My mom raised me on her own, I have no father figure, despite my dad being a considerable part of my life, and 4/5 of my friends are girls, so maybe that have something to say.