A guy gets put into a trance through spirals, swinging pendulums, glowing eyes, or some other mind-control gimmick, and his willpower basically melts away. The sex leans hard into forced obedience, blank stares, and suggestible arousal, with the hypnotist using the victim like a compliant toy for sucking, fucking, and cum play. Sometimes the control is framed as consensual kink, but the vibe usually stays predatory and controlling.