I think a lot of people (including myself) consider sexual orientation a sliding scale, or a "continuum." I think it's easy for people to call themselves "gay," "straight," "bisexual," or "experimenting," when really it's just not that black and white. In my opinion, it's more of a percentages thing. For example, I could call myself "bisexual," but people tend to think of that as I like men 50% and women 50%. In fact, I think I would say I like men 70% and women 30%. It's not even enough for me to label myself bi (especially considering I've only *dated* men), but it's significant enough that I can't call myself "straight" or even "bicurious" (I've been in love with women who didn't love me back).
I guess I would agree with those here who have said it takes time to figure it out--and really, don't worry about putting a label on it. Just worry about who and what makes you happy, male, female, trans, intersexed, whatever. <3