I also had a pervy middle school science teacher. He used to prop his....ahem...man parts...up on the corners of the desks while he lectured. One girl got really angry at him about it one time and just SLAMMED her fist down...right at the corner. He retired that year.
My mother told me stories about her science teacher (he actually taught them also glassmaker technology) that did EXACTLY the same thing. No girl punched him like that, though. What is it with science teachers?
We also have a computer stuff teacher (I have no idea of the subject's name in English, sorry) that, when you need help, just puts his hand on the mouse over yours. It's quite creepy. Once he asked us to help move some things from one classroom to another after school and one boy asked how much is he willing to pay for it as a joke. He answered: "Five bucks a night." Ew.