The butter battle book:

Yooks watch over Zooks
Yooks will always spread their butter side up
Zooks must spread their butter side up to respect the law.
More down below \/

Outlaw restaurants require the butter side down on the bread
If a Zook spreads their butter side down, the Yooks need to execute the traitor if seen doing so.
Bitsy Big Boy Boomeroo is a nuke.