Seen that happening a lot

Yes indeed.

They learn quickly the power of cussing. "Please" and "Thank you" become passe and automatic. An unexpected "fuck you"? Now you're talkin'.

I was with my three year old and we were talking about just stuff when she said something that caused me to call her a booger and said she fell out of her mother's nose. Her response was priceless: "I'm not booger. I didn't fall out of my mother's nose. I fell out of her vagina."

I was speaking to a friend in her dining room while her nephew was in living room. Every time i used an expletive, the boy came in and informed me he knew i was saying bad words. The next time i saw his dad, he said, " oh hello esther. My son told me you have a potty mouth. " i responded, "how'd HE know so many bad words michael??"

that's been my experience

Well the little guys copy their parents.

That had the ring of truth to it...wonder why that is so?