Here are some randomly selected joke topics
Repent
Knock, knock.
Who's there?
Marion.
Marion, who?
Marion haste, repent at leisure.
Pigs
Joe: My pig has lost his voice.
Jake: Really. I bet he is upset?
Joe: Oh yeah, he's disgruntled!
Worry
You worry too much about your job. Stop it.
You're not paid enough to worry.
Computers
Beware of Programmers who carry screwdrivers.
Knock Knock
Knock, knock.
Who's there?
Faye.
Faye who?
Fayeding away.
Mouse
When does a mouse need an umbrella?
When it's raining cats and dogs.
Deny
Man Denies He Committed Suicide
Politicians
The reason they bury politicians 26 feet under is because deep down they're nice guys.
Jewel
Knock, knock
Who's there ?
jewel
jewel who?
jewel see better if you open the door