Mbugua left to go help in the Crusades and decided that his wife waithera should wear a chastity belt. So he locks her up and gives the key to his best friend, Muysoka. He tells him,
“If I’m not back in four years, unlock my wife and set her free to live a normal life.”
So, mbugua leaves on foot and about a half hour later, he sees a cloud of dust behind him. He waits for it to come closer and sees Musyoka.
“What’s wrong?” Mbugua asks. Musyoka replies. “You gave me the wrong key!”