Here are some randomly selected joke topics beginning with the letter 'T'
The future
The future isn't what it used to be.
The flu
How can you tell when Count Dracula has caught the flu?
He'll be coffin.
The dark ages
In the twelfth century how many workers did it take to change a light bulb?
None. There were no light bulbs - it was the dark ages.
The future
Patient: Doctor, doctor I keep thinking that I can see into the future.
Doctor: And when did this happen?
Patient: Next Wednesday.
The difference
What is the difference between inlaws and outlaws?
Outlaws are wanted.
The difference
What is the difference between a hill and a pill?
A hill is hard to get up and a pill is hard to get down.