In the quiet of his office, the professor's cock twitches at the sight of his young student's bare thighs. She's here to learn, but he has other lessons in mind. He guides her head to his crotch, teaching her the art of fellatio with patient, expert instruction. Her inexperienced mouth feels incredible, but it's her tight, shaved pussy he craves. Lifting her onto his desk, he parts her legs, running his fingers through her slick folds. She gasps as he penetrates her, her virgin cunt stretching to accommodate his thick cock. He fucks her deeply, each thrust filling her with new sensations. Her moans echo through the empty halls as she learns the true meaning of "extra credit."