One day a mother and father decided they needed a code word for "sex" so they could talk about it infront of their child, and they eventually agreed on the word "typewriter". So, a while later the dad tell his daughter to tell mommy he need to "write a letter", the child comes back to tell her dad "Mom says you cant write a letter because there is a red ribbon in the type writter". A few days later the girl tells her dad he can write that letter now, but the father replys "Its too late hun, I already wrote it by hand!"