Yeah.. it's basically being able to fall in love with both genders.
I consider myself bisexual now, cuz I want to keep all my options open for now. I've fallen for guys and girls. In the beginning it's pretty much confusing. It's also a fact that bisexuality isn't taken seriously most of the time. But I guess.. when the time comes we all pick either to be gay or to be straight. It can sometimes be a midway stop for people who are questioning theirselfs. They'll be bisexual for a while just to see what is more their thing.