Here are some randomly selected joke topics
Ghosts
Why is a ghost like a cold breeze?
Because it makes people shiver.
Favorite
What is the favorite sport of Farmer Brown?
Fencing.
Doctors
How many doctors does it take to screw in a light bulb?
That depends on whether it has health insurance.
Waiters
Waiter, waiter, what's this fly doing in my soup?
The breast stroke, sir.
Economists
How many economists does it take to change a light bulb?
None. If the government would simply leave it alone, it would change itself.
Elves
Q. What did the elf use to make him taller?
A. He used elf raising flour.
Farmers
In college I'm studying Pharmacy - because I've always wanted to be a farmer.
Boxers
How do you get a boxer to laugh?
Start telling a joke and then hit him with the punchline.
Cows
What do you call a cow that just had a calf?
Decalfinated!