Why is it that mostly bisexual males speak up and are ready to explore their bisexuality then women. Is it because these are no bisexual women or are they just quiet?
Men like to spread their horniness around, and talking about it is one way of doing that. Women like the experience just as much but don't get off on talking about it.
Or, from another perspective, it could be that men are trying to help liberate each other. A lot of women talked about feminism and women's liberation before actually working it into their lives. Most men don't even have the language to express what they are feeling. These forums provide some vocabulary and experience-sharing for them.