Kids again....

A husband and wife decided they needed to use "code" to indicate that they wanted to "enjoy relations" without letting their children know, and they decided on the word Typewriter.

One day the husband told his five year old daughter, "Go and tell mummy that daddy needs to type a letter".
The child told her mother what her father had said, and her mother responded, "Tell your daddy that he can't type a letter right now because it's not working properly."
The child dutifully returned to tell her father what mummy said.
A few hours later the mother told her daughter, "Tell daddy that he can type that letter now."
The child told her father, returned to her mother and announced, "Daddy said never mind with the typewriter. He's already written the letter by hand."