A husband and wife decided they needed to use “code” to indicate that they wanted to have sex without letting their children in on it. They decided on the word Typewriter.
One day the husband told his five year old daughter, “Go tell your mommy that daddy needs to type a letter.”
The child did as she was told, and her mother responded, “Tell your daddy that he can’t type a letter right now because there is a red ribbon in the typewriter.”
A few days later the mother said to the daughter, “Go tell your daddy that he can type that letter now.”
The child went to tell her father, returned, and announced, “Daddy said never mind, he already wrote the letter by hand.”