The teacher had given the class an assignment.
He stresses the importance of this particular assignment, and that no
excuses will be
accepted except illness (with a medical certificate) or a death in the
immediate family (with a
note from that member).
A smart-ass student pipes up: "What about extreme sexual exhaustion,
sir?"
The class breaks up laughing, and when they settle down the teacher
responds with:
"Well, I guess you'll have to learn to write with your other hand."