The problem, I believe, the essential issue with humankind, the reason we are all always at some level or another pissed off, is Reality Sucks. No, no, really, hear me out. Animals don't have the same problem because, hey, face it, no matter how much your dog chases balls in his sleep, he's not dreaming about how great life would be if something were a little different. He's okay, really, with his schedule -- scratch, eat, sleep. How wrong could you go with that? He's not in line for a promotion and there isn't this list of things he wants to get done before he's twenty-five, because he'll be a lucky dog if he lives to see sixteen.