Why did Santa need an extra large desk at the North Pole?

He had a lot of Claus-es in his contract.

What did the gingerbread man put on his bed?

A cookie sheet

Why did Santa's elves start a petition at the North Pole?

Because they wanted to clause out their overtime!

Why did Santa send his elves to conflict resolution training?

He wanted them to learn how to 'workshop' their differences.