Any time I want to orgasm, I have to edge, hold the edge and my breath for 10 seconds, and the flip a coin. Tails and I don't come. Heads, and yay, I get to finish! I then make a mark on my thigh with a permanent marker.
Next time I want to come I have to flip the coin an extra time for each visible mark. It has to land on heads every time in order for me to be allowed an orgasm.
If I flip tails and want to try again, I have to wait five minutes with my mouth full, be it...