Men are still fed the cultural narrative that women exist for them and they do tend to think that if they are attracted, that means a woman is (or should be) too. Not surprisingly, when you teach men to pay attention to actual body language and other signals from women, they are quite capable of gauging actual interest - rather than assuming that women are there for their pleasure and enjoyment. I can't seem to find the study right now, but it has been studied and confirmed.