From Kafka's Joke Book:
A horse walks into a bar. The bartender asks, “Why the long face?”
“I was born into servitude, and when I die, my feet will be turned into glue,” replied the horse.
The bartender realized he would not be getting a tip.or, how bout this one:
“Why is a raven like a writing desk?”
“I don’t know,” Gregor told the faceless interrogator for the fiftieth time.
“We can’t help you if you won’t work with us. Perhaps another day in the machine will convince you to cooperate.”