Smart answers:
A teacher at West Australian (hand on heart, that's the way it was told to me) university reminded her students of tomorrow's final exam.
"Now listen to me, I won't tolerate any excuses for you not being here tomorrow. I might consider a nuclear attack, a serious personal injury, illness, or a death in your family, but that's it. No other excuses whatsoever!"
A smart-@rsed teenager at the back of the room raised his hand and asked "What if I come in tomorrow suffering from complete and utter sexual exhaustion?"
The entire class was reduced to laughter and sniggering. When silence was restored the teacher smiled at the student, shook her head and sweetly said,
"Well, I would expect you to write the exam with your other hand".