Mistress Erika has her slave strapped securely to the whipping bench. This slave has been wanking and emptying his balls without permission from his Mistress. That's not allowed. The slave must learn the correct behaviour as instructed by his Mistress. Therefore he is going to be caned. Mistress administers a sound caning, on both his Ass and his feet. He also has to suck her strap on. Lesson learned.