Another Filthy Joke

A teacher was wrapping up class, and started talking about tomorrow’s
final exam. He said there would be no excuses for not showing up
tomorrow, barring a dire medical condition or an immediate family
member’s 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 teacher glared at the student,
and said, “Not an excuse, you can use your other hand to write.”

(there are more jokes at Filthy Letters)