What is the difference between a rapist and a dictionary?
One of them knows the definition of no.
What is the difference between a rapist and a dictionary?
One of them knows the definition of no.
This joke is dark and disturbing. It plays on the idea that a rapist does not understand or respect the word "no", while a dictionary, which contains the definition of every word, definitely knows what "no" means. It's a grim comparison that uses wordplay.