Waiting on the train, the commuter's mind wanders, eyes scanning the crowd. A woman in a tight skirt boards, her presence stirring unwanted arousal. As she stands nearby, her scent fills his nostrils, her body heat radiating, making his cock twitch. He tries to distract himself, but her occasional glances and swaying hips keep drawing his gaze. His hand slowly inches towards his crotch, rubbing discreetly as he imagines her moaning in pleasure.