I think I've finally figured out why children exhaust me so much.
It's because they're wonderful but the world they live in is not. And I don't like having to be the one to explain to them that it's not. (Note how I said "that it's not" instead of "why it's not." Fuck if I know why.)
Also, it sucks that they haven't yet figured out that adults don't have all the answers. We have fewer answers than they do, really. The kids I spend time with are so imaginative and energetic and great. But they're tiny so they're the first to get stuffed into boxes. They're small enough to fit.