I really didn't want to have to do this, Prof. But I know all about your dirty little secret.
Don't deny it. How do I know? Because one time you wore panties to school. You thought no one noticed... you thought no one knew... but I did. You bent over at one point and I could see your pink thong sticking out of your shorts.
So, that night, I googled your name--and by cross-referencing some of your different online handles, I was able to find you active on lots of sites about feminization, orgasm denial, and all sorts of other perverted stuff.