I have a large plexiglass clamp and I think it would fit perfectly on my submissives balls. Instead of just tormenting him outright, I am going to play a game with him. I am going to place the clamp on him and as long as I can continue to tighten it on his balls I will allow him to feel a vibrator on his cock, but when it becomes too much for him the vibrator stimulation will stop. I wonder how flat I can get his balls...