I'm your professor, and I'm appalled by your lack of hard work this term! Fortunately, I have the solution; I'm going to turn you into my Roman slave for the rest of the term, and possibly longer if I think it necessary. Specifically, I'm going to make you my 'Pathicus' a slave to be used for penetration with my strap on dildo. We're going to start right now, with fellatio, and after that I'm going to fit you with a nice big steel ring gag before I fuck your mouth some more, followed by your ass. That should teach you a well-deserved lesson!