I love face sitting and I train My boys to make their faces the perfect ass cushions for Me. One of the most important things they need to learn is how to adequately hold their breaths for as long as I desire. I like to use a pulse oximeter on My slave's finger to monitor the O2 levels in his bloodstream; it's the perfect tool to know how long I can sit on My slave's face and safely deprive him of air. Otherwise they just start squirming much too early, ruining My pleasure. Obviously, being My ass cushion makes My slave aroused, so, to make things more interesting, I will only jerk his cock... Show more