This office chair has seen its fair share of late-night sessions, but never quite like this. The man, a strapping amateur, grips the armrests, his knuckles white as he fucks his hand with urgency. His huge cock glistens with pre-cum, the scent of his arousal heavy in the air. He's been at it for hours, the anticipation building, his body aching for release. Finally, with a final, forceful stroke, he unleashes a torrent of cum, his body convulsing as he paints the chair and the floor with his thick, creamy load.