I actually DO NOT BELIEVE the percentage of women cheating is that high. Not even close. Women are more prone to lying to each other as opposed to their men, and current Western degeneracy is a plethora of sensationalism status.
Modern Western women still have this delusional outlook on men, dating, and marriage....so they simply say what they think is expected of them. Even here on /pol/ women receive the very mixed signals from the very males that claim to care about female purity.
Look at the women's faces in [pic related], and consider all the other examples of survey taking such topics.....the vast majority of these women are simply telling the pollster what they think is expected of them, not necessarily the truth. It's the same reason why exit polling is so off, so often.