Here are some randomly selected joke topics beginning with the letter 'S'
Scared
What happens if you get scared half to death twice?
Scare
How do you scare a confirmed bachelor?
Sneak up behind him and start throwing confetti.
Sawdust
He's so stupid he doesn't get dandruff - he gets sawdust.
Sausages
What do you call a stolen pork sausage?
The missing link.
Say
Keep talking, someday you'll say something intelligent.
Say
What is the only thing you can break when you say its name?
Silence.
Savings
Where do vampires keep their savings?
In the blood bank.
Say
What did one candle say to the other?
You keep getting on my wick.
Sawdust
What is made of wood but can't be sawed?
Sawdust.