Amy, a blonde city girl, marries a Wyoming rancher.
One morning, on his way out to check on the cows, the rancher says to
Amy, "The artificial-insemination man is coming over to impregnate one
of our cows today. I drove a nail into the two-by-four just above the
cow's stall in the barn. You show him where the cow is when he gets
here, okay?"
So the rancher leaves for the fields. After a while the
artificial-insemination man arrives and knocks on the front door. Amy
takes him down to the barn. They walk along long row of cows
and when she sees the nail, she tells him, "This is the one....right
here."
Terribly impressed by what he seemed to think just might be another
dizzy blonde, the man asks, "Tell me ,little lady, how did you know this
is the cow to be bred?"
"That's simple; by the nail over its stall," Amy explains very
confidently.
Then the man asks, "What's the nail for?"
She turns to walk away and, with complete confidence, says, "I guess
it's to hang your pants on."