The old man's hands guide the teen's head, controlling her pace as she learns to pleasure him. She gags at first, but soon finds a rhythm, her inexperience making her eager to please. He groans, his cock throbbing in her inexpert mouth. He warns her, but she continues, eager to taste his cum. He explodes, filling her mouth with his hot, salty load. She swallows it all, then licks her lips, a newfound confidence in her eyes. The bus stops, and she steps off, a changed girl, leaving the old man with a satisfied grin and a wet crotch.