I know this is gonna sound like I am making it up after my last few posts but: We had a kid in a wheelchair in my class and he'd crank off at his desk. He's dead now.
only thing I have to add is we had a girl in a motorized wheelchair that would run people over in the halls on purpose in high school. and I mean RUN OVER
I have a student who has been suspended multiple times for masturbating in class. Last week he was rubbing a nipple.
We had a kid in a motorized wheel chair because the programming teacher hit him with her car while he was riding his bike on a busy road. He would just yell out obscene stuff constantly.