Here are some randomly selected joke topics beginning with the letter 'C'
Consultants
Shall we bring in a consultant, or shall we screw it up ourselves?
Consultants
How many consultants does it take to change a light bulb?
We don't know. They never get past the feasibility study.
Consideration
Twelve year old's essay on 'what would you do to try and encourage motorists to show more consideration for others?': 'I would drive a police car.'
Consultants
A consultant is a person who borrows your watch, tells you what time it
is, pockets the watch, and sends you a bill for it.
Convicts
What do you call a convict who dresses up as a clown?
Silicon.
Contact lenses
What type of dog wears contact lenses?
A cock-eyed spaniel.
Convert
Did you hear about the angry inch-worm?
He was angry because he was told he had to convert to the metric system.