Imagine, it is the 19th century and you are from the middle classes. You sometimes think it could be nice to be a little poorer, then perhaps you wouldn't have to use toothpaste. It's not that you don't like your teeth to be clean, but your teeth aren't exactly in great condition. Indeed, nobody's really are and rubbing the powder which comes in that dreaded little ceramic pot into them is just plain painful! You have a new type which is supposed to numb the pain a bit, but you don't hold out too much hope.