Here are some randomly selected joke topics
Bookkeeper
Every time I let John borrow a book, he keeps it. He's a professional bookkeeper.
Bees
What goes "zzub, zzub"?
A bee flying backwards.
Ants
What do you call a ninety year old ant?
An antique.
Dracula
Did you hear about the man who kept thinking he was Dracula?
He was a right pain in the neck.
Snakes
What do you call a snake who is employed by the government?
A civil serpent.
Parliament
Guy Fawkes was the sanest man who ever went into the Houses of Parliament - and look what happened to him.
Airplanes
What is red and green and jumps out of airplanes?
A parrot-trooper.
Doctors
Doctor, Doctor.
I can't stop sneezing. What can you give me?
A tissue?
Oh no, it's happening to you as well.
Candle
What did one candle say to the other?
You keep getting on my wick.