Am I Bisexual, or just sexually curious?

[Lewis Curious]

I am around 18 years old (don't want to specify my age on a public website because I'm just paranoid like that), and I like girls, the thought of naked girls gives me an erection, however, unlike other guy's in my year level, the idea, or the actual event of seeing a guy naked does not repulse me, I am able to recognise whether a guy is handsome, or good-looking, and there are some guy's that I have even had feelings towards, and had a temptation to kiss them. The idea of touching their genitals in an intimate way does not disturb me, and, although I like sex with girls, and like the thought of it, I have often fascinated what it would be like to be a woman and have sex with a man, as woman have longer lasting and more intense orgasms, sex, if done properly, is more enjoyful for a woman. Also, there is a girl that I think is very beautiful, she has soft features on her face, but some people think that she looks like a guy because she has short hair. And then there is a guy who I think is very cute, and, like this girl, he has soft facial features, both of them I have an urge to kiss. Like I said, I like the idea of sex with girls, but at the same time, I am curious about sex with boys, provided that I am the receiver, and that they wear a condom.

Am I Bisexual? or just sexually curious? I would really like to know the answer so that I can feel comfortable with who I am and my identity instead of being confused about what I am.
to life is a paradox: But that's just the thing, I don't actually know if I like sex with guys aswell, as I have not tried it.

P.S., gay sex, since I said that I have imagined being the receiver, does it hurt? (with a condom, as I do not want to get any std's)