There is a double standard when it comes to sex. Maybe men want the woman to be "pure"?
I agree with Synnen, if you and your partner are going to engage in things like this - there needs to be rules and a good understanding of what is going to happen. Both need to equally be on board with it. But what happens when this relationship breaks up? Not because of what goes on in the bedroom but because of life? And the woman is left to find a new love? How will that new love judge her? Will he walk away like 4answers did and look at her with disgust when he sees her on the street? Will he accept the fact that she had a life before they met?
Most men (that I know of) have a fantasy of a threesome. Who do they think is going to participate? A WOMAN. Am I to believe that these women that could "lower" themselves to participate in a threesome with this man are just not good enough to date or love? Whatever.