Using a piece of metal I tied his balls in a way that it's impossible for them to escape (no slipping, no retraction), keeping him grounded to the bed. His hands are tied behind his head and on the bed's frame. Bondage completed, my slave is ready to surrender to my feet.  I know he can't handle a long session with my toes so I make sure I pull the rope attached to his balls when I see him ready to explode. I wondered how long he can last like that. Needless to say he spilled all of his juices on my feet in no time. Having him tied like that I decided to continue for some post orgasm torment and that's an extremely light punishment for exploding so early!