What makes for a great ass? For me it's got to have the right amount of firmness and "cushioning". Used to be a Russian named Natasha (what else) at 4000 Steeles many moons ago. She had great tits, but could make me cum with just her ass, she'd press her pantyhose covered ass against my hard dick, engulf it, and then skootch up and down until I exploded, which unfortunately did not take very long under her efforts. Man I miss the ol days when there was an EE spa on almost every corner.