Whether genetically based or "epi-genetically" based, I believe that most homosexuals same sex urges have their origins if not in the womb, then in early childhood. Nonetheless, I am not arguing that point. I am simply saying that even if that is true, it does not legitimate the behavior. One could equally argue that our murderous urges have their basis in our "reptile brains" (the limbic system)--that does not make them morally acceptable. We are born with proclivities to sin--for some, the proclivity to sin may include homosexuality. Being "born that way" only demonstrates our fallen nature, not our God-given nature.