someone's face is not exactly something that is sexually arousing most of the time. Sure general attractiveness is based upon the most prominent features of a person, and the face is basically the most noticed feature. That's exactly why (most) make-up is for the eyes/lips/face, because that is a human beings billboard of attractiveness. There is a line, which i cant seem to distinguish, between physical attractiveness and sexual attractiveness. Somewhere along that line the thought goes from "Man, she is pretty" to "I want to bend her over a table and ravish her". At least from my point of view, generally i look at someone's face and determine if they are physically attractive to me, and then proceed to oogle other parts of their body with more sexual intent.