...to me than the unexpected feeling of fingertips suddenly touching around the girth of my cock whilst pushing into a woman. Just something about it when she has to reach down and feel me with her fingers as I'm sliding into her. I love it! Also: When she goes from that fingertip gauging to a wanton self-pleasuring, fingering her clit while I'm really pounding. It's the unconscious abandon, the overriding need to seek the most pleasure from the moment. Easily the most erotic two things a woman can do.