I'm a man, but, it seems, I'm not a typical man. I'm very comfortable with my emotions. In general, in serious relationships, I have to be attracted to a woman's personality. If that isn't there, I don't get as much out of the sex part. And sometimes I'm not attracted to her at all sexually.
However there are times when I just want a spontaneous adventure, not a serious relationship, and her personality doesn't matter. So the attraction would be mainly physical.