Mr. Johnson: "Honey, it's been a while since the Worthingtons have been over for a visit."

Mrs. Johnson: "And I don't think they'll be back."

Mr. Johnson: "Really? Why?"

Mrs. Johnson: "You insulted Mrs. Worthington's cooking after that last potluck."

Mr. Johnson: "Honey, I never said she was a bad cook, I merely pointed out that since they'd been here, our garbage disposal had developed an ulcer."