It is the case for a lot of people who may end up “gay” (however you want to define that) and for whatever reason engage in their activities out of rebellion, for fun, to be crazy, or maybe their whole world is just upside down. Some people get over that and thus “choose” to be straight. It happens and I’ve seen it happen, more than once.
I think that’s called being bisexual.
Well, whatever, I don’t really like the idea of a “sexual identity” anyway so I think of sex in terms of action. Either way, these people I’m talking about very much believed that they were into the same sex, and they clearly were. Did they lie? They’ve lived the “gay experience” just as much as, sometimes more so than the LGBT-whatever activists.