AJ was asked to come to your house because she heard that you have the biggest cock at college. She has been tasked with determining if this is actually the case. She wants you to take out your cock and start working on it for her. If you really put on a good show, you will get to fuck AJ and all of her girlfriends. That sounds like supreme motivation and your dick instantly responds. AJ pulls down her top and shows off her very perky titties and you see that her nipples are erect.