People are shit. They're mean, selfish, and by and large cause nearly all the problems we experience every day. Everyone has pets, and most of the time their relationships with them are completely pure and positive. The relationship I have with my rat is like nothing I've ever experienced with any person. It's closer to the relationship one would have with their own child, given the dependence they have upon one for their care, but without all the annoying shit like having to get up in the middle of the night and wipe the shit off them (most animals are far cleaner than children). I don't see that there's any mystery at all. The mystery is that any of us have ever liked each other enough to form towns and cities and nations without committing absolute, irreversible mass genocide in the process.