Not exactly "naughty", like sexual, but still bad. In High School for Pre-Calc I had this asshole ex-Navy pilot for a teacher. One day he was handing out tests and he stops by this one girl's desk and says, "I shouldn't even give you one of these. You'll just fail again, 'cause you're stupid." Then he just laughed to himself and sat down. I was in tears. Shit was hilarious.