John gets a call from his blonde girlfriend, Buffy. "I've got a problem," says Buffy.
"What's the matter?" asks John.
"Well, I've bought this jigsaw puzzle, but it's too hard. None of the pieces fit together and I can't find any edges."
"What's the picture of?" asks John.
"It's of a big rooster," replies Buffy.
"All right," says John, "I'll come over and have a look."
So he goes over to Buffy's house. Buffy leads John into her kitchen and shows him the jigsaw on the kitchen table. John looks at the jigsaw and then turns to Buffy and says, "For Pete's sake - put the Cornflakes back in the box."