The classroom door clicks shut, leaving only the sound of heavy breathing and the soft, rhythmic slurping of a coed's hungry mouth. She's a vision of youthful enthusiasm, her perky tits heaving as she bobs up and down on her professor's massive cock. He's reclined in his chair, a picture of nonchalance, but his grip on her ponytail betrays his desire. She's a quick learner, her tongue swirling, her throat relaxing to take him deeper. Her hand works his shaft in tandem with her mouth, her pace quickening as she nears her goal - a perfect score in this most intimate of exams.