Health, moi aussie: They found it in flies. They altered a gene and they made it so that a male fly would be attracted to male pheromones and genitalia.
Look, I’m not claiming that all homosexuals are Anusim who can’t help what they feel. There are certainly those who could go through therapy (and I mean normal therapy, not the obscene “reparative” therapy which amounts to nothing more than serious physical and sexual abuse) and come out heterosexual or at least able to repress their homosexual tendencies. However, we must realize that there are people who are born with no attraction to women and we must give them our full sympathy and not allow disdain for those who had a choice to disdain those who had no choice as well.