You've got to love the Internet. Especially the way it provides a place for everyone, no matter how small and obscure their passion.
The usual reference for this is Rule 34: "If it exists, there is porn of it." But I don't think you have to reach for the Barney-the-Dinosaur-and-cranberries porn to show the wonder of the InterWeb.
Case in point: catsinsinks.com
Yes... this is a site about cats. In sinks. Seemingly endless images of felines hogging the bathroom.
"If it exists, there is a website about it."