At my brothers house one day my niece was having a discussion with her friends who were over and apparently didn't realize my great niece was nearby.
She apparently heard the word condom and came and asked me what it was.
I was so taken aback by a 4yr old asking me this out of the blue I just stammered, "Umm better go ask your dad".
Which she did, but she said "Dad, uncle John (Not my real name) told me to ask you what a condom is".
This set off much inquiry on my nephews part and kinda left me hanging until my dad piped up and muttered "Its what your father should have used more of".
This took everyone by surprise until he started talking about the rest of the meal and we realized dad had no idea what was going on as he's damn near deaf. Hes talking condiments.
Took us all a bit to stop laughing and dad had no clue what had transpired until later when I was explaining the situation to my nephew out on the porch.