To the contrary. Having sex with a woman (girl, in this case) who is all but indistinguishable from other women (as in this case) does not "undeniably" make somebody a homosexual. I personally am undeniably homosexual (I prefer gay, actually) and I've known that since I was 11. Much of what what makes me gay is that I don't want to have sex with a woman. If I had been in this young man's position, I would have felt no sexual desire or arousal. Because I'm gay, meaning I'm attracted to men and not to women or teenage girls.

I mean, I go to drag shows sometimes for the fun of it, but when the queens are dressed and made up as women, I feel no sexual attraction to them. I often even feel sexually turned off.

I mean, MAYBE this guy always knew she was trans and maybe he has some sort of toxic fixation on trans girls. But that's not "homosexual." It's a sad and probably pathological way of relating to sex and sexuality.

People sure have funny-strange ideas about homosexuality sometimes!