Another one...I had a bad habit of cursing around the kids not thinking they were listening. One day my wife went food shopping with our son who was about 3, and she came home pissed. I asked what happened. She said he was sitting in the top of the cart and dropped his toy on the floor. He leaned forward, looked down at the toy, and said, "Jesus Christ!". What made her mad was people heard him and he basically imitated the way I would say it.