Bulges straining, the Kings engage in a test of endurance. Mark, in chastity, squirms as Calvin runs a firm hand over his trapped cock. They switch, Calvin now feeling Mark's expert, torturous touch. On his knees, Mark submits to Calvin's powerful grip, wincing as his balls are ruthlessly crushed. Sweat beads on their skin, their moans a symphony of pleasure and pain as they test the boundaries of their male chastity.