And that's maybe the real reason why everything is so bad in our century… If people can even changed what they genetically don't like about themselves it's normal people can't accept that things don't go their way in the everyday life. Instead of accepting what/who/how we are we constantly search a way to change it, no wonder people need therapy.
And, i'm repeating myself, if we keep on searching a reason (genetics, social environment, ...) for being gay people will keep on believing it ain't normal, that's something we need to change and/or "cure" and our conditions won't evolve neither will do people's beliefs...
Plus, the more people turns to science to explain "how can they be gay" the more it gets ridiculous... Now having a big brother can make you gay? What's next? Leaving in a special neighborhood would too? Or new Mcdo's ads "don't let children eat cucumber, they'll turn queer, make them eat burgers"...
Scientifics should focus on curing diseases and find ways to live longer instead of finding solutions to what isn't a problem.
Religions and narrow-minded people are sufficiently hating and harrassing us, we don't need science to put water on the fire