Princess Morbucks: So, tell us again why we're only stealing toilet paper, light bulbs, milk, flour, and eggs.
Mojo Jojo: Well, Moko's idea is that stealing items that are all white isn't against the law. So, it's okay to take them.
Princess Morbucks: Huh?
Mojo Jojo: It's all right 'cause they're all white!
This is a reference to The Beatles' White album.