A professor was wrapping up class, and started talking about tomorrows final exam. he said there would be no excuses for not showing up tomorrow, barring a dire medical condition or an immediate family members death. one smart ass, male student said, "what about extreme sexual exhaustion?" and the whole classroom burst into laughter. after the laughter had subsided, the prof glared at the student, and said, "not an excuse, you can use your other hand to write".