The trainer's deep, authoritative voice echoes in the sissy's mind as he's ordered to stroke his cock, but not too much - he's not allowed to cum yet. The sissy's hands tremble as he grips his chastity device, struggling to follow the trainer's orders. The trainer, her own arousal evident in her breathy commands, watches with satisfaction as the sissy's cock strains against the device. She leans in, her tits brushing against the sissy's face, and whispers, "You'll learn to love the taste of cum, my little sissy. But first, you must learn to serve."