My wife and I were super careful around our son when he was a toddler, but one morning I was rushing him from the car to a building entrance in the rain and he yelled at the top of his lungs "JESUS F***ING CHRIST!* so loudly that I'm certain the entire neighborhood heard him. I was mortified! And yet, somehow, he's now seven years old and for years he's the one who gets annoyed with anyone who uses bad language (or says "Christ" in a song lyric - he's glaring at you, Edward Sharpe & The Magnetic Zeros).

While we'll never know for sure where he picked up the expression, the only clue we have to identify the culprit is an oddly awkward laugh the story got out of his grandmother...