Here are some randomly selected joke topics beginning with the letter 'A'
Accept
Do you want people to accept you as you are or do you want them to like you?
Absentmindedness
There are two things I dislike in a person -
Absentmindedness and... I can't remember the other one.
Abdominable
What is nine feet tall, has fur covering all its body, and never answers 'yes' to a question?
The abdominable no-man.
Abbreviation
Why is 'abbreviation' such a long word?