This is a good video. A shock collar around the balls is also an option. If I ever get married, I will wear a shock collar all day long, and my wife will carry the remote control in her purse. Shock collars are a great way for dominant women to train submissive men. Shock collars don't require much effort on the part of the mistress, but shock collars are very effective in controlling the slave. The woman can punish the man at the click of a button. What a great idea.