Here are some randomly selected joke topics beginning with the letter 'S'
Sergeant
What do you call a dentist in the army?
A drill sergeant.
Sentence
Threatening letters - man asks for long sentence
Set
Why is it called a TV "set" when you only get one?
Serve
Why are judges good at tennis?
They serve in the court.
Sentence
"Matrimony isn't a word, it's a sentence."
Sewers
Did you hear about this guy who lived right next door to a sewer and killed himself?
The coroner said it was sewercide.
Service
Sarcasm is just one more service we offer.