Sorry to intrude on the discussion, but there is actually a lot of evidence that supports this. There are studies about female promiscuity and even sexual economic models. Most of the theories I've read state that women enforce female promiscuity far more than men (even--especially, actually--in the most sexually "repressive" cultures in North Africa and the Middle East). One of the main reasons for this is that women have a very careful balance of power that revolves around sex. The less they give it up, the more value it has, and the more they can get from men for it (again, in many "repressive" countries, a family with a pretty daughter can radically change their social status). One promiscuous woman can fuck up that whole economy and wreck the situation for dozens of women.