Discreetly displaying his wares, a confident gym-goer boards the train, his tight gym shorts leaving little to the imagination. The prominent bulge in his crotch draws covert glances from fellow commuters. He nonchalantly touches himself, his massive member straining against the thin fabric, a freeballing exhibitionist delighting in the thrill of potential discovery. As the train screeches to a halt, he pulls out his throbbing cock, stroking it roughly until he erupts in a cumshot, leaving a trails of his load on the floor.