Here are some randomly selected joke topics
Law
Court of law - the place where a suit is pressed and a man can be taken to the cleaners.
Doughnut
Knock, knock.
Who's there?
Duncan.
Duncan who?
Duncan your doughnut again?
Succeed
If at first you don't succeed, destroy all evidence that you tried.
Months
Q. Some months have 31 days how many have 28?
all of them - all months have (at least) 28 days.
Employees
How come you never hear about gruntled employees?
Nothing
If you have nothing to do, please don't do it here.
Dracula
How can you tell when Count Dracula has caught the flu?
He'll be coffin.
Revenge
How do you get your revenge on a doctor?
Give him a taste of his own medicine.
Dogs
What do you call a dog that works in a library?
A hush-puppy!