In the crowded train, she's oblivious to the man beside her, until his thigh twitches against hers. Glancing down, she sees the tent in his pants. A daring idea strikes. She crosses her legs, her foot brushing against his crotch. His breath hitches. She repeats, pressing harder, feeling him grow. The car jolts, her foot slips, and she accidentally grips his length through his pants, making him groan. She freezes, then blushes, but her foot continues its exploration, bringing him to a climax that leaves him breathless and her shoes sticky.