Good link proving people choose homosexuality:
http://rethinkingtheology.com/2012/07/07/are-homosexuals-really-born-gay/
During the late 70's and early 80's, with all the "coming out" of homosexuals there was a CONCERTED effort by American and most Western scientists to validate that outing, that homosexuality was just the way SOME folks were built.
It was big news. After that BOLD announcement the ensuing years were crystal clear, loud and clear, whatever, that ANYTHING but heterosexuality was a CHOICE
The SILENCE from all those researchers was DEAFENING.
I followed it because, being Catholic, I was taught that ANYTHING but heterosexuality was a sin.
End of story.