Why do we never tell jokes about pizza?

What happens when two monkeys get a divorce?

What vegetables do librarians like?

What is it called when a tree takes time off from work in autumn?

How do scientists freshen their breath?

Why did the aerospace engineer have a hard time passing English?

Where do hamsters come from?

What do you call a Russian flea?

How is life like toilet paper?

What animal has the worst mood swings?

What fish sings the best?

When is it bad luck to see a black cat?

What did the momma pig say when her piglet had nightmares?

Where do actors go to pray?

Have you heard the one about the bad pole-vaulter?