Standing on his balls

Tsk tsk... looks like I've got you by the balls. Now be a good bitch and keep still or else!

Standing above him, you place your foot on his balls threatening to squish them. Grinning at his helpless squirming, you drape your other leg over his shoulder and place your pussy on his face. Grinding your foot on his dick and balls and your pussy on his face, the message is simple: sit still or suffer.