Thanks to eskimo for sharing this joke with us.

A high school English teacher reminds her class of
tomorrow's final exam. She tells the class there would be no excuse for not showing up,except for serious injury, illness, or a death in the student's immediate family.
A smart ass jock leans back in his chair & asks,
"what about extreme sexual exhaustion"?
The entire class does its best to stifle their laughter and snickering. When silence is restored, the teacher smiles sympathetically at the student, shakes her head, and sweetly says, You can write with your other hand.