I've invited you to my house, professor, to discuss my grades. I know I haven't been doing as well as I should, but i'm hoping we can work something out. If not, I have LOADS of blackmail information and I know the administrators name and number, and your wife's. If you don't change my grade to an A, I will tell everyone about your dirty little foot fetish secret. To obtain more blackmail material I instruct you to jerk it for my perfect feet and my sexy red heels.