She feels you grab her ass and like a good whore moans back with you. She hear you don't like having you ears touched and being a whore she knows that sometime 'no' actually means 'Yes! Oh God Yes!' However being a dumb whore she thinks you meant your real ears and leans over you shoulder to nibble on them a bit. By doing so she ends up getting her self off more as her breasts and tender nipple rings rub harder against you.