Before heading to war, Paddy secures a chastity belt on his wife, entrusting the key to his friend Fergus.
Paddy instructs Fergus, “If I don’t return in 4 years, open it.” He then sets off on his journey on horseback.
Half an hour later, Paddy spots a dust cloud approaching and realizes it’s Fergus. Concerned, he asks Fergus what’s amiss.
Gasping for breath, Fergus reveals, “It’s the wrong key!”