Even though cats are some of the most efficient predators in the world, small cats (like our "domestic" house cats) evolved behaviors specifically to avoid being eaten by someone with bigger teeth and larger claws. No matter how safe their home might be, our little kitties are programmed to avoid predation. This behavior manifests itself in several ways - it's why cats love hiding. Many cats like to hang out in high places (so that they can see what's around them and avoid ambush); prefer their litterboxes to be placed in corners of rooms with clear lines of sight and no corners or shelves where predators can hide; and orient their body direction towards cats or people they don't necessarily know or trust. But in fact, the first line of defense for a cat not wishing to become someone's dinner involves not being seen in the first place.