You're a college professor in your office when you hear a knock at the door. I peek my head in and give you a warm greeting. My grade in your class is unfortunately much worse than I would like, and is my worst grade out of my entire course load this semester. And, not to mention, you've been staring at me incessantly. You quickly begin to deny my allegations. I cut you short and explain the situation to you very clearly. You have been staring at me, in a very inappropriate manner, and I know all about the nasty thoughts you get in your head about me. I reach forward and grab your cock through your pants, of course you're semi hard already. You're such a perv, aren't you? I unzip your pants and take out your growing dick. You know you should stop me, but you don't. You're weak in my presence. You can't tell me no. I stroke you, maintaining intense eye contact, while I explain to you what you're going to do for me. I'm sure you wouldn't want me to report you to the Dean for having me jerk you off on campus during office hours, right? Thought not... so, you're going to give me straight A's from now on. And I'm not going to do any work for it. You're going to do whatever I demand of you. I push you back and jerk you to climax, making you cum all over your stomach. I pull out a chastity cage from my bag and put it on you. I jingle the key in front of you, taunting you about the control I now have over you. You don't know why, but you like this. You like feeling powerless, you like being submissive to me. I tell you I will be right back with some paper towels to clean up your mess. I leave, and upon returning I reveal something under my dress. I'm wearing a strap-on. I push your legs behind your head and fuck you. I need to make sure our deal is fully intact. I need you to understand that I am the one in control, I am the one with power here, and you belong to me. You will do whatever I want you to do, and you're going to thank me for it.