9 Doctors Who Have Redefined "Sexy" on Grey's Anatomy

Mark Sloan, the McSteamy to Derek's McDreamy. Derek is clean cut, whereas Mark is a little more dirty. Mark is a blatant womanizer who's overly confident and a little corny, but that doesn't seem to turn women off. In fact, it does the complete opposite. We're pretty confident Mark has slept with the most people on Grey's. He may as well live in the on-call room.