My mother had two gay male cats from the same litter. Gayness is probably some sort of pre-natal hormonal issue.
Years ago I talked to a practicing psychologist who said that all of us go through something like a homosexual ‘stage’ as young teens, but grow out of it. I know a number of gay folks & I have to say that their behavior can often be characterized as juvenile. Not that the rest of us are incapable of juvenile behavior. But with them it’s very consistent juvenile behavior!