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When sitting down on a stool naked, you start rocking back and forth and as you rock back and forth, your ass cheeks start spreading open revealing your asshole as you thrust backward and as you thrust forward, your ass cheeks close and thus your asshole isnt revealed anymore.
Man o' man. she knows how to poke it out sitting on that stool. she has one hot asshole.
by Bobby Knobi February 01, 2010