In "Master's Urinal," a new sub is introduced to the world of water sports and chastity play. Bound and gagged, he's positioned before the urinal, his face inches away from the cold porcelain. The trainer's voice echoes, commanding him to let go, to give in to his body's needs. The sub hesitates, but the trainer's firm hand on his back urges him on. The first stream is tentative, then it flows freely, filling the cup beneath. The trainer, amused by the sub's discomfort, orders him to stroke his cock, now leaking precum. The sub, teetering on the edge of release, is denied, his chastity device clicked back on, leaving him hard and desperate for more.