I had added this to another post but I thought you might enjoy it on it's own merit.
Conversation with the wife on a ride yesterday:
Her: "Why am I pedalling and you're coasting?"
Me: "I'm in a different gear."
Her: "Well, tell me what number gear you're in so I can start coasting."
Me: "There aren't any numbers to tell you."
Her: "Why do you always do this to me? You know there's a gear where I can coast just like you are, but you won't tell me what it is."