|Amy, a blonde city girl, marries a Colorado rancher. One morning, on his
way out to check on the cows, the rancher says to Amy, "The insemination
man is coming over to impregnate one of our cows today. I drove a nail
into the 2 by 4 just above the cow's stall in the barn. You show him where
the cow is when he gets here, OK?"
So then 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 the 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 ditzy blonde, the man asks, "Tell me lady, how did you know this is the cow to be bred?" "That's simple. By the nail over its stall" Amy explains confidently.
Then the man asks, "What's the nail for?" She turns and walks away, and with complete confidence, says, "I guess it's to hang your pants on."