Here are some randomly selected joke topics
Dentists
What to do you call an old dentist?
A bit long in the tooth.
Police
Police move in book case
Trains
What do you call a train that is carrying toffee?
A chew chew train.
Legs
What has four legs, a back, and two arms but no body?
A chair.
Vampires
Why was the student vampire feeling very tired this morning?
Because he stayed up all night studying for his blood test!
Cannibals
First Cannibal: "Have you seen the dentist?"
Second Cannibal: "Yes, he filled my teeth at dinner time."
Teachers
Old teachers never die, they just grade away.
Lightning
What did a bolt of lightning say to another one?
You really are shocking!
Cows
If your cow sounds like this, bake it and eat it "moo,moo". If your cow sounds like this I would take the fish "Moo ahhh,moo moo ahhh".