My cousin who was my age was also a sissy at age 5 and admitted he was gay at age 16 or 17. All of us played together and we knew something was not right.We also knew he wasn't right at that age. He was never abused and had a good relationaship with his dad.
Like you I also believe some gays are born that way. Not all but a %. Maybe not enought testosterine etc at birth.
How interesting. The few gay men I have known had terrible relations with their fathers. Dads were either absentee, abusive, or alcoholics. I'm aware that my very limited acquaintances with gay men are not sufficient for broad generalizations, but they do fit nicely with the common perception that gay men are looking for love that they didn't get from their fathers.