The boss returned to the office after lunch and was in a great mood. He called all the staff into his office so he could tell them some jokes he had picked up. "Everyone laughed uproariously, except for one girl who didn't even crack a smile.

"What's with you, Judy," grumbled the boss. "Have you lost your sense of humor?"

Looking at him straightfaced, she replied, "I don't have to laugh. Friday's my last day!"