For the life of me, I cannot understand what purpose gnats serve.
I do understand that gnats either have itty-bitty cell phones or telepathy and can call their friends from halfway across the state to drop by my house when I'm out mowing. Then, they all get together and see how many of them it takes going in and out of my ears / nose / eyes / mouth until I do some sort of psycho-dance in the middle of the yard slapping myself silly.