Prompt

A muscular man with neatly trimmed black hair appears from the right and begins licking the nipples and grasping the penis of the man in the center. As he does so, the central man's pectoral muscles bounce, his hips move slightly and slowly, his testicles sway, and pre-cum drips from the head of his penis. The dark-haired man fondles the central man's pectorals, abdominals, and biceps, and also touches his penis. The penis maintains its shape and length, pulsing rhythmically without vanishing or distorting, while a large amount of fluid flows from it. There is no background music. Afterward, the dark-haired man begins performing fellatio on the central man. The central man ejaculates just one second after the act begins, spraying a large amount of semen. There is no background music.