There are so many things that go into it. The kind of power play that goes on between the two of you goes into it. Everything enters into desire. [It's] far more complex than arousal.

Women's sexuality has a lot to do with intimacy. It has a lot to do not so much with foreplay so much as after-play and between play. If after sex he rolls over and starts to snore, that's not going to stimulate her to want to have sex again the next time.