Just the totally normal kind of conversation that my 9 y/o and I have.
S (9 y/o, sung completely unprompted, at full volume):
"What do you do with the drunken sailor?
What do you do with the drunken sailor?
What do you do with the drunken sailorrrrrr?
Put him in a French bag!"
Me: What's a French bag?
S: It's a bag. That's very French!
Me: Okay, but how do you know if a bag is a French bag?
S: It goes around saying, "French Bag! French Bag!"
Me: ...
S: And it has "French Bag" written on it.