I’ve known a few homosexuals over the years and each and every one was damaged in some way. Usually sexual abuse and some just mental and emotional abuse. If you dig deep enough into the psyche of the homosexual, you’ll find abuse in, I’m betting, 95% of cases.
Many male homosexuals have definite effeminate characteristics which leads me to believe it's determined at birth. If it were just a case that they were attracted to males and everything else was the same, you wouldn't see all that effeminate behavior.
Ditto for all the females with strong butch characteristics. It has to be something at birth. They haven't found a homosexual gene, so it I have to conclude it's hormonal. A lack of testosterone for males and a lack of estrogen for females.