Anonymous, horny men fill the bus, their eyes locked on the straight, curious newcomer. They scent his hesitation, his excitement, and their erections tent their pants. A proposition is made, money exchanged hands, and the straight man finds himself on his knees, his mouth stretched around a stranger's cock. The bus rumbles, his head bobs, his cheeks hollow as he sucks, the taste of pre-cum unfamiliar but not unappealing. He's passed from lap to lap, each man grunting his pleasure, his own cock hard and aching in his pants.