On the site I work for, bicurious men sign up as women in "Intimate Encounters" so they can have cybersex with guys without having to identify themselves as gay or bi.

As I read their profiles, I often wonder what their home lives are like. Do their wives have a clue? I worked with a guy who told me he was gay but because he lived in a small town, he couldn't act on it and he wanted kids so he got married. His poor wife probably knew deep down that he was gay but wants kids, too.

As for women posing as men - there's no need for them to do so. Lots of couples are on the Web looking for "action" and there's not as much of a stigma for women to experiment.