AMY, a city girl, marries a farmer. One morning, before he goes out to the fields, the farmer says to her: “The artificial insemination man is coming to impregnate one of our cows today. I drove a big nail into the two-by-four over the cow’s stall. You show him where it is.”
So the farmer leaves, and a while later, the artificial insemination man arrives. Amy takes him down the rows of cows until she sees the nail.
“This is the one, right here,” she says.
“How do you know?”
“By the nail over its stall,” Amy says.
The man asks: “What’s the nail for?”
Amy replies: “I guess it’s for you to hang your pants on.”