Caught sleeping in the nude on a public train with an erection

A young 18-year-old lad was caught dozing off in the nude on a public train, sporting an erection. The incident stirred quite a commotion among the passengers, and the train conductor took it upon himself to intervene. The young man was promptly escorted off the train and handed over to his grandfather for disciplinary action. The grandfather, being a stern disciplinarian, decided to teach the boy a lesson he wouldn't forget. He ordered the young man to bend over and proceed to spank him right across his exposed buttocks. The sight of the young man's bare behind, coupled with the sound of the grandfather's firm hand smacking against it, was enough to arouse the young man's cock. This led to a steamy encounter between the two, with the grandfather taking the young man from behind, his every thrust captured in close-up shots. The encounter culminated in a satisfying climax, leaving both participants thoroughly satisfied.