I want to see how long I can sit on my slave's face, so I tape up his mouth and bind my slave tight on my bed and get out the timer. I start easy at first, but push this slave to the edge. He has no choice but to lay there with his nose up my ass while I control when and how he breathes. If he can't meet my time goals or complains, he gets a swift knock in the balls with my ball knocker. I can't help but laugh while he tries to wriggle free, trying to get any gasp of air he can muster. How long can he last under my ass? Will he set a new record, or will he pass out trying?