Prompt

A muscular, naked man with, neatly styled brown hair appears from the left and begins licking Eun-Sang’s nipples and grasping his penis. As he does so, his pectoral muscles flex, his hips move slowly and subtly, his testicles sway, and pre-cum drips from the head of his penis. The brown-haired man fondles Eun-Sang’s pectorals and abdominals and touches his penis; the penis maintains its shape and length, pulsing rhythmically without vanishing or distorting, while copious amounts of fluid flow from it. Eight seconds later, a man with reddish-brown hair begins performing fellatio on Eun-Sang. Immediately afterward, Eun-Sang ejaculates a large amount into the brown-haired man's mouth, and semen drips from the man's lips.