We all have those theories that are hard to prove, or that might sound crazy to some. But nonetheless, you're certain they're true. For example, Immortalkitten is certain that her cat knows when she's thinking of using her drawing tablet. Being insanely jealous of the silly square Kitten likes to pet, the cat will get in the way, sitting on her tablet while she's trying to use it... or settling in Kitten's lap before she even makes a move to get her drawing tablet.
Anyway, here are some interesting or weird theories of mine.