Here are some randomly selected joke topics
Know
Knock, knock!
Who's there?
Jerry!
Jerry who?
Jerry funny, you know perfectly well who it is!
Dogs
What type of dog wears contact lenses?
A cock-eyed spaniel.
Doctors
Doctor, doctor, I keep stealing things.
Have you taken anything for it?
Trains
What do you call a train that is carrying toffee?
A chew chew train.
Police
Police Officer: Why are you driving in a bathing suit?
Motorist: I'm in a car pool.
Mudpack
John: Did the mudpack help your wife's appearance?
Harold: It did for a few days, but then it fell off.
Bananas
What is yellow and goes click-click?
A ball-point banana.
Microscope
Why did the germ cross the microscope?
It wanted to get to the other slide.
A Horse
What is drawn by a horse and delivers boxes of chocolates?
Cadbury's Milk Dray.