Wife and I and our youngest was on vacation. Wife was the navigator (before gps) she got us lost in the middle of the night. My son, who was 2.5 at the time was in his carseat. I thought he was asleep. I let loose with a couple of off color words. Luckily the only one he picked up was dammit! Of course, it got a reaction from my wife, which made it even worse. For the next 100 miles or so, he'd holler out dammit! dammit! at the top of his lungs. When we ignored him, after a while he quit using it.