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The aftermath of hard anal sex with a girl (without using lube). When the guy has spilt his custard into her ass and her sphincter is swollen, the custard oozes out creating a custard donut. Optional to get her girlfriend to lick it out.
Man, I give it to her so hard up the ass, then made her friend eat the custard donut.
by Dewey Lo July 20, 2011