On Muses; Overheard in Hampstead

Sitting in a Hampstead coffee shop today, I overheard this conversation between a bored teenage Claudia Schiffer look-alike and her mom.

Mom: Wouldn't you like to be someone's muse?
Daughter: What's a muse?
Mom: It's a person who inspires an artist.
Daughter: Oh! You mean like Victoria Beckham and the way she inspires Marc Jacobs?