It is said that everyone is bi to some extent. Not sure about this. But I also heard about the same from some professional sites. Maybe it depends on how to define it.
If you can appreciate the beauty in both men and women, and find yourself attracted to the person regardless of their gender,then you are bi. Many hot and sexy bi singles & couples on ** BiLoves dotcom ** are looking to explore their bisexuality,coming out or enjoying their lives as bi here.
If you don't know whether You Are Gay, Lesbian Or Bisexual,you may check http://www.youtube.com/watch?v=yDjtVS9iaDA. The psychotherapist Dominic Davies will tell you the answer.