" After 15 years living in Paris, I felt myself growing old and stagnant—similar to stagnant water sitting in a bowl; cats have a survival instinct not to drink this water. They can sense when it’s old and may be carrying air-borne germs. After 15 years in Paris, I no longer felt drinkable. "

― Roman Payne , The Love of Europa: Limited Time Edition (Only the First Chapters)