Plus I just had this convo with my wife. I think men often cheat because of ego. There is absolutely nothing a woman can do that compares to the rush and ego boost a man gets when a new chick (that you're attracted to) shows interest in you. Its conquering, accomplishing, etc when a man pursues and then gets a woman. The newness is great but its also just a rush that can't be beat which is why men in happy relationships with great women can step out.