Shall I keep reading?
A joke about a man who has spent too long reading to someone --- he's read to them so much that they've literally died, perhaps of boredom, and their body is being eaten by birds. An over-exaggeration of the feeling of boredom one might experience if someone was reading something to them that they don't care about. It's funny because the man reading doesn't seem to realize that he's literally killed the other person of boredom, and offers to keep reading even after their death.