I have been asking myself this question for quite some time, too. And yesterday, actually a friend of mine asked like, how do people know they're gay? etc etc, and I was like, How do you know you're straight? Don't you just know? But I don't know! LOL so that reasoning doesn't work at least in my case, and from what I have read, your case too.

You are def not alone in your 'viewing preferences' too, i am also early 30s and enjoy what you do, as opposed to "straight" stuff...

So maybe I live vicariously through you, keep us posted!

(don't know if this helped at all, but wanted to comment on your thread...so, yeah)