Before Paddy goes to war he fits a chastity belt on his wife.
He locks it and gives the key to his best friend Fergus.
“If I’m not back within 4 years, open and enjoy!”
He hops on his horse and hits the road. hits the road.
A half an hour later he notice a dust cloud behind him. He stops and sees that it is Fergus. “What’s wrong?” he asks.
Out of breath, Fergus answers: “It’s the wrong key!!”
