Calvin, eyes downcast, awaits Mark's touch, his breath hitching as Mark's gloved hand wraps around his caged cock. Mark's other hand cups Calvin's heavy, aching balls, fingers massaging the tender flesh through the thin fabric of Calvin's underwear. Mark's voice, low and commanding, orders Calvin to stand, to present himself. Calvin rises, hands bound behind his back, chest heaving. Mark, with a cruel smile, pinches the head of Calvin's cock, making him gasp. 'You like that, don't you?' Mark growls, twisting his fingers, sending jolts of pain and pleasure through Calvin's body, his balls swelling, desperate for release, but Mark's iron grip on his chastity device ensures that relief remains elusive.