Why is a dead doctor like a dead duck? Because they have both done quacking.
Why is a commercial traveler whose "walk in life" is selling eggs, certain to be successful? Because he shows a good egg-sample from egg-sell-ent motives (example from excellent motives).
Why is an egg overdone like an egg underdone? Because it's hardly done.
What is most like a hen stealing? Why, a cock-robin.
Why have chickens no fear of a future state? Because they have their next world in this (necks twirled).
By what female name would an egg object to be called? Addle-laid (Adelaide).
Why ought cocks to be the smoothest birds known? Because they always have a comb about them.
Why is a dirty man like flannel? Because he shrinks from washing.
What is the difference between the earth and the sea? One is dirty, the other tidy.
Why is geology considered a deep science? Because it penetrates deep into the earth.