Roll Them Bones
Look at only my eyes for this picture. On only this page, you are forbidden from so much as glancing at my breasts.
Roll the die. For this page only, I'm taking away your option to substitute ball smacks. You may only stroke while looking into my blue eyes on this page. There is a penalty for cheating. If your eyes happen to glance down at my big round breasts or my pretty pink nipples with my shiny silver rings in them, this is what you will have to do. Finish your strokes by looking into my eyes.
Then you will have to give yourself the same number of thwacks to your nuts, whatever you rolled, all while looking at my eyes. If your eyes wander again, you will finish that number of ball smacks, and then you will start over, smacking your balls another round, the same number of times. You will do that until you get it right.
So don't fuck with me. Better just to do what I tell you on the first try.