The bus lurches, sending our eager rider's hand to his crotch, where he finds his throbbing cock straining against his zipper. His eyes meet those of a nearby passenger, who grins wickedly, encouraging the exhibitionist inside him. He strokes his meaty shaft, the friction building, as the bus rolls on. His breath hitches, and he lets out a low groan, his body convulsing as he cums, painting the bus floor with his hot, sticky load. The scent of sex fills the air, leaving passengers wondering what just happened.