Here are some randomly selected joke topics beginning with the letter 'A'
A Christmas tree
What do you get if you cross a pig with a Christmas tree?
A pork-u-pine.
A comedian
Patient: Doctor, I keep thinking that I'm a comedian.
Doctor: You must be joking.
A cough drop
It was so quiet you could have heard a cough drop.
A clear conscience
Why do ghosts never feel guilty about what they have done?
Because they have a clear conscience.
A consultant
I don't work here. I'm a consultant.
A comeback
Reincarnation is making a comeback