In medaevil times a lord was going away on crusades and told his wife to put on a chastity belt. She did and he tucked the key away but got to thinking what would happen to her if he were killed in battle He summoned the chief servant and told him to keep the key to his wife's chastity belt in a safe place so she could be freed if he did not return.

The lord rode away and was almost out of sight of the castle when the chief servant raced up to him and cried:"M'Lord you gave me the wrong key!"