A young, muscular man, alone in his bathroom, begins to flex his bubble butt in front of the mirror. As he pushes harder, his asshole stretches and, to his surprise, a large prolapse emerges. He gasps, shocked, but curiosity and excitement take over. He tentatively touches the pulsating flesh, feeling its heat and slickness. He decides to take things further, lubing up and inserting a few fingers into his gaping hole, pushing the prolapse back inside. He moans, lost in the intense sensation, and begins to furiously masturbate, his massive cock throbbing with desire. He fucks his asshole hard, fingers and dick plunging in and out, until he can't hold back any longer, his cum spurting out, coating the bathroom floor.