Amelia has a "night-night." Anyone who has ever met her knows that. She doesn't like to go anywhere without it. We ended up getting several back up "night nights" just in case one ever got lost or dirty and needed to be washed. Early on we could swap them out no problem and she didn't notice. Now, she is loathe to release a night night once it's good and dirty. Now, even if we wash what she is calling "dirty old night night" she seems to have developed a preference for one of them that can apparently be discerned upon smelling the ear in just the right way. Behold: