u gave me the wrong key

A man decided to march in the holy crusades. Concluding that his wife
should wear a chastity belt while he is gone, he locks up her nether
regions and gives the key to his best friend. He tells him, "If I do
not return within four years, unlock my wife and set her free to live a
normal life."

So, the husband leaves on horseback and about a half hour later,he sees
a cloud of dust behind him. He waits for it to come closer and sees his
best friend. "What's wrong?" he asks. "You gave me the wrong key!"