Why are pilots always in a good mood?
Because they're on cloud nine!
What do you say to the person who invented zero?
Why did the lizard go on a diet?
What did the biologist wear on his big date?
What did the baby bird say on Halloween?
What does the cow say when her kid closes the barn door?
Who invented the first airplane that couldn't take off?
What does an attorney say when getting married?
What's the holiest insect?
What's the best soap to use on St. Patrick's Day?
What grandma is always trying to give you fruit?