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!!”