My 3 year old son was helping me wash my truck last week, sprayed himself with the hose accidentally am said "God damnit" in the perfect tone. Can't imagine where he got that one?
So these stories are older kids but-
My dad was a principal. Back in the 70's there were no dress codes.
Large breasted girl approx 8th grade was dressing in a way that was causing a lot of excitement with the guys and generally being a distraction.
Dad calls the mom in for a meeting, she shows up dressed just like the daughter dresses, big boobs, no bra and all.
Dad said, "Never mind, we took care of the situation." There was no winning that one.
Another time, similar thing but the kid was in trouble for cussing a lot.
Parent comes in, dad explains problem, parent turns and cusses the kid out using every word in the book.
Turns back to my dad with a straight face and in all seriousness says, "I don't know where he gets it from but you let me know if it continues to be a problem."