A farmer is giving his wife last-minute instructions before heading to
town to do some business.
"That fellow from Sematol will be along this afternoon to inseminate
one of the cows. I've hung a nail by the right stall so you know which one
I want him to impregnate."
Satisfied that his wife understood the instructions, the farmer left for
town.
That afternoon, the "Inseminator" arrives, and the wife
dutifully takes him out to the barn, directly to the stall with the
nail." There's the nail so this is the cow right here," she
tells him.
"What's the nail for?" the guy asks.
Replies the wife, "I guess it's to hang up your pants."
