My slave doesn't know what to expect when I call him over and his head face down on My chair. he doesn't have time to take in a breath before I sit on his head his face deep into the seat, ensuring breathing is impossible. I sit on his head longer and longer each time, as he can't see Me, he can't see when I am going to sit to sit down again, so it's even harder for him to time his breaths. I am actually quite impressed at how long he can hold on for. Maybe next time I'll make him .