It seems difficult to maintain that there can be a genetic cause for homosexuality. Surely, homosexuals as a group must have a distinctly lower reproduction rate than the population at large, and any genetic influence would breed itself out in only a few generations. I once mentioned to one of my sons who was studying at the Royal Academy of Music that I had read that homosexuals often came from family backgrounds where there was a strongly dominant mother and a mild, timid father. He said that there were quite a number among his friends at the Academy, and every single one of them fitted that description. Finally, I believe that people with homosexual tendencies are often very caring, and play a very valuable part in the community as teachers, nurses and counsellors.
Sexuality is primarily instinctive, and deviation is incompatible with an instinct.
I completely disagree. But saying that you are leaving yourself open to murderers who kill people because some instinct tells them to. There are deviant instincts. Deviant just means not the norm. No two ways about it.