Here are some randomly selected joke topics
Athletes
If athletes get athletes' foot. what disease do astronauts get?
Missile toe.
Teachers
Teacher: What is the name given to the small rivers that flow into the river Nile?
William: The Juve-Niles?
Mistakes
You have the capacity to learn from your mistakes.
You're bound to learn a lot today.
Business
Knock, knock.
Who's there?
Nunya.
Nunya who?
Nunya business.
Lawyers
What's a good example of a missed opportunity?
A bus-load of lawyers going over a cliff with one empty seat.
History
History does not repeat itself; historians merely repeat each other.
Teachers
Why are maths teachers so useless at gardening?
Everything that they plant grows square roots.
Dentists
What award does the dentist of the year get?
A little plaque.
Woodworm
Why did the woodworm eat a sofa and two easy chairs?
It had a suite tooth.