This is a true story from my high school days. One day our German class was unusally talkative despite repeated warnings, and our teacher was becoming rather exasperated. After what must have been the sixth or eighth warning, he raised his voice to declare, "Allright! The next person who talks is going to be severely castigated." The class was then very quiet for a few seconds, at least until a girl in the front row asked the teacher, "Mr. T--, how are you going to do that to a girl?"
(From the "Rest" of RHF)