A man walks into his local butcher’s shop and complains about the leg of lamb that he had previously bought.
“When I cooked it the joint had shrunk so much it went from 12 inches long to only 4-inches. “
The butcher said to the man
“That’s funny, my wife knitted me a sweater and when she washed it, it was also 4-inches in length. “
“What’s your sweater got to do with my leg of lamb? ” asked the man.
The butcher replied
“Well they both must have come from the same sheep. “
This joke is included in the Black Book of Jokes. You can order it from here.