In the realm of gay BDSM, Kings Calvin and Mark rule supreme. Today's challenge? A CBT session that'll make the toughest groan. Calvin, bound and helpless, wears a jockstrap that barely contains his eager cock. Mark, the sadistic top, teases Calvin's bulge, tracing the outline of his chastity device. He then unleashes a flurry of smacks, making Calvin's balls bounce and throb. The room is a symphony of moans and the sharp smacks of skin on skin, as Mark pushes Calvin to the edge of endurance, celebrating his power and Calvin's devotion to their kinky bond.