A high school teacher reminds her class of tomorrow's final exam. "Now class, I won't tolerate any excuses for you not being here tomorrow. I might consider a serious personal injury or illness, or a death in your immediate family, but that's it, no other excuses whatsoever!"
A smart guy at the back of the room, raised his hand and asked, "What would you say if tomorrow I said I was suffering from complete and utter sexual exhaustion?"
The class is reduced to laughter and snickering. When all was silent, the teacher smiled knowingly at the student, shook her head and sweetly said,
"Well, I guess you'd have to write the exam with your other hand."