Here are some randomly selected joke topics
Birds
What kind of books do owls like to read?
Whoo-dunnits.
Boxing
When is a boxer like an astronomer?
When he is seeing stars!
Chickens
Why did the chicken run away from home?
Because she was tired of being cooped up.
Managers
The manager started his speech at 10 a.m. sharp and ended at 11 a.m. dull.
Father Christmas
What do you get if you cross Father Christmas with a duck?
You get a Christmas quacker.
Coward
What is chunky, white, and cowardly?
Chicken salad.
Doctors
Doctor, Doctor I've just swallowed a pen.
Well sit down and write your name!
Overweight
You know you're overweight and need to diet when your knees buckle but your belt won't.
Friendly
Knock, knock!
Who's there?
Cat's purr.
Cat's purr who?
Cat's purr the friendly ghost.