Here are some randomly selected joke topics
Dentists
What award does the dentist of the year get?
A little plaque.
Elephant
Why wasn't the elephant allowed on the plane?
Because his trunk wouldn't fit under the seat in front of him.
Windows
Windows: Just another pane in the glass.
Time Travel
There's no future in time travel
Hi
Knock, knock.
Who’s there?
Hi.
Hi who?
Hi, who are you?
Giraffes
What do you get if you cross a hedgehog with a giraffe?
A really long hairbrush.
Astronauts
Where did the astronaut get his degree?
At the mooniversity!
Intelligent
Did you hear about the very intelligent monster?
He was called Frank Einstein.
Kitten
How does a contented kitten feel?
Cat-isfied with life.