Bilbo points to this list of twenty jokes "that only intellectuals will understand." Two samples:
It is hard to explain puns to kleptomaniacs because they always take things literally.
Jean-Paul Sartre is sitting in a Parisian sidewalk cafe, revising his draft of Being and Nothingness. He says to the waitress, "I'd like a cup of coffee please, with no cream." The waitress responds, "I'm sorry, sir, but we're out of cream. Would you like it with no milk instead?"