Our 2 year old picked up "Oh God" from somewhere. I don't say that (I might say "Jesus fucking Christ!" on occasion, but not around him!) and neither does my wife, but it's kind of got her in a tizzy. She's religious so doesn't want him to say it, I really don't care if he does or not, but probably best that he doesn't. I can always teach him to say "Jesus fucking Christ!" when he gets older.
Christian apologetics is the art of rolling a dog turd in sugar and selling it as a donut.