Here are some randomly selected joke topics beginning with the letter 'A'
A stick
If I throw a stick, will you leave?
A stage
If all the world is a stage, where is the audience sitting?
A surfer
How do you catch the attention of a surfer?
Wave.
A test
"This is a test of the Emergency Broadcast System. If this had been an
actual emergency, do you really think we'd stick around to tell you?"
A strawberry
This bloke said to my brother, 'My trouble is I keep thinking I'm a strawberry.'
My brother said, 'You're in a jam then aren't you.'
A tail
What has a head and a tail but no body?
A coin.