sexuality doesn't work like that ლ(TДTლ)

Isn't it just the usual trope of a gay man not realising he was gay at first? That's why he switched over once he had a homosexual experience. And then the other guy seems more demi or something.

Maybe more like he was a bisexual in denial that realized after dating a man that he has a preference to men? It could be possible. Some people don’t realize their sexuality until later in life.