A young, muscular jock, clad only in tight, white underwear, finds himself alone in his room, his mind filled with lurid thoughts. He can't resist the temptation to stroke his hardening cock through the thin fabric, feeling the heat and friction. With a groan, he pulls his underwear down, revealing his thick, veiny member. He jerks off, his fist sliding up and down his shaft, pre-cum glistening at the tip. His breath hitches as he feels the familiar tingle at the base of his spine, his abs tightening as he cums, ropes of semen shooting onto his stomach.