Here are some randomly selected joke topics
Witches
Why did the witch drop out of school?
She couldn't spell.
Skeletons
How do you make a sad skeleton laugh?
You tickle it's funny bone.
Octal
Counting in octal is just like counting in decimal, if you don't use your thumbs.
Birds
What type of bird flies in formation, and releases red, white and blue smoke?
The red sparrows.
Coward
What is chunky, white, and cowardly?
Chicken salad.
Judges
Why are judges good at tennis?
They serve in the court.
Girlfriends
Jack: I'd go through anything for you.
Mary: Just the door will be enough.
Pizza
Knock knock.
Who's there?
Pizza.
Pizza who?
I'm gonna give her a pizza my mind!
Stupid
Calling you stupid would be an insult to stupid people.