I have clingy cats. They were separated from their mom at a very early age, as she had FIV. Because of this, my cats are very human-centered, and do unusual things like coming when they're called (or even whistled for). They don't like to be on their own, like a lot of cats; they want a person present whom they can cuddle with or boss around.
One of my cats (the black one, of course) does a magickal ritual to bring me home when I've left, and she even performs this ritual sometimes when I'm in my home office (into which no cats may enter--too much breakable stuff). The ritual consists of the kitty raiding a rather too-easily accessible sock drawer, obtaining a sock, and dragging it to the middle of my bedroom floor.
My kitty's ritual combines a couple of the most basic magical laws: the law of contagion (the sock is mine and thus psychically linked to me), and the law of evocation (using the right formula, the desired entity can be made to appear).
And ya know--from the cat's perspective, this ritual has worked every single time.