We have a restaurant chain here called Black Angus. Once, years ago, the "g" was burnt out which led to this conversation:
Me (age 12), mom & dad start giggling at the sign.
My brother (LB) (9) and sister (LS) (4) start giggling with us.
LB: WHAT are you even laughing at LS? You don't even know what that word means.
LS: I'm laughing because it's funny when everyone laughs.
Dad: LB, do you know what that word is?
LB: Yes, DUH, Dad.
Dad: Well, what does it mean?
LB: Well, Mom knows.
Mom: Yes, but I want to know if you know.
LB, with a sigh: You should know what it is. You have one. It's a lady's privates.
Dad had to pull the car over because he was crying laughing. The tone is everything here. LB was being *so* superior to LS at the time. It's become family legend.