A few weeks ago, I went walking in Maymont Park, a gem of a park in Richmond, Virginia. There, I saw a little girl drinking water out of a creek. She was about seven years old and didn't appear to be a feral child - no, she was too well dressed for that.

Now I don't know much about parenting, but some things are cut-and-dry. I felt I had a moral obligation to say something to her. It takes a village and whatnot.

"Hey, you shouldn't do that," I said sternly. "The water could have germs in it that will make you sick."

She stared at me blankly. As soon I rounded the bend, I saw her go back for another sip.