“Hello, “exclaimed Jonathan, as he met his friend Michael. “You’re looking a bit off color. Anything wrong?”
“I’m afraid there is, “replied Michael, “I’ve had to give up drinking, smoking and gambling. “
“Well, I must say that’s all to your credit, “commended Jonathan.
“Oh, no, it isn’t, “snapped Michael. “It’s due to my lack of credit. “
This joke is included in the Black Book of Jokes. You can order it from here.