Here are some randomly selected joke topics
Horses
My mum said to my uncle, 'What's got four legs and flies?'
My uncle said, 'Don't tell me, the horse is dead.'
Prison
Did you hear about the cement truck that crashed into the prison bus?
They ended up with a bunch of hardened criminals.
Fish
Why are fish easy to weigh?
Because they have their own scales.
Driving
Police Officer: Why are you driving you car wearing only a bathing suit?
Motorist: I'm in a car pool.
A Comedian
Patient: Doctor, I keep thinking that I'm a comedian.
Doctor: You must be joking.
Dentist
How did the dentist become a brain surgeon?
His drill slipped.
Getting Old
You know you're getting old when your back goes out more than you do.
Hole
He's a few yards short of the hole.
Teachers
Why are maths teachers so useless at gardening?
Everything that they plant grows square roots.