Here are some randomly selected joke topics beginning with the letter 'C'
Challenged
You're not old. You're chronologically challenged.
Change
Boy: Can you change twenty pence for me?
Father: Yeah, that's no problem.
Boy: Good. Change it to fifty pence please.
Challenging
He finds knock-knock jokes challenging.
Change a light bulb
How many psychiatrists does it take to change a light bulb?
How many do you think it takes?
Chairs
How do you make a bandstand?
Take their chairs away.
Change a light bulb
How many British Rail staff does it take to change a light-bulb?
Two. One to change the bulb and one to apologize for the delay.
Change a light bulb
How many drummers does it take to change a light bulb?
None. They have a drum machine to do that that now.
Chair
How do you make a hot dog stand?
Take away its chair.
Change a light bulb
How many bankers does it take to change a light bulb?
Four. One to hold the bulb, and three to try and remember what the combination is.