My son, Sam, at three and a half, had these keys to a set of plastic handcuffs,...

My son, Sam, at three and a half, had these keys to a set of plastic handcuffs, and one morning he intentionally locked himself out of the house. I was sitting on the couch reading the newspaper when I heard him stick his plastic keys into the doorknob and try to open the door. Then I heard him say, "Oh, shit." My whole face widened, like the guy in Edvard Munch's . After a moment I got up and opened the front door.
"Honey," I said, "what'd you just say?"
"I said, 'Oh, shit,'" he said.
"But, honey, that's a naughty word. of us have absolutely got to stop using it. Okay?"
He hung his head for a moment, nodded, and said, "Okay, Mom." Then he leaned forward and said confidentially, "But I'll tell you why I said 'shit.'" I said Okay, and he said, "Because of the fucking keys!