Well, let me start off by saying that at one time or another, everybody is curious about members of the same sex. (Ok maybe not everybody- maybe like 99.9% of people.)
And of course, there's absolutely nothing wrong with actually BEING bisexual. But just because you've thought about it or are curious doesn't make you bisexual.
Having said that; if there's somebody that you feel comfortable trying this out with, and you don't have ANY second thoughts or doubts about it, then go ahead! This is a good time of your life to try new things and establish who you are as a person, and more specifically, as a sexual being. Kinda like
"try before you buy". Haha. If you decide to do this, and you like it, then great! And if you don't, well you don't have to do it again. I'm always the one to say though that I'd rather have fun and try new things, and even if I have regrets about it afterwards, it's not as bad as the regret you have when you had the opportunity to do something and you didn't do it.
Again, DON'T do it if you don't feel 100% sure that you're ready for this, and if you don't feel 100% comfortable with the person you'd be doing it with. And you still need to have protection and all that- so go out and get tested, and have your partner get tested, and then you're good to go!
Good luck with whatever you choose to do!