It annoys me, hearing things like this. Sure, there are those people out there who pretend to be gay or bisexual because they think it's "in." Some are just utterly confused. But maybe, just maybe, more people are showing up in the gay community because society is far more accepting than it was twenty years ago.
Anyway, rant aside, I believe my sister (she's majoring in science, so I'm quoting her xD) once told me that there was a study out saying it was actually genetic for some? I mean, don't pin me to my words, it was a while back. I thought she mentioned that some gay men didn't grow facial, back, chest hair, etc. I'm sure there are people out there that just don't grow hair and whatnot, so... Google it maybe?