Dogs May Laugh, but Only Cats Get the Joke - New York Times

Dogs May Laugh, but Only Cats Get the Joke - New York Times: "Laughter is not always about what’s funny, as Robert R. Provine, a professor of psychology at the University of Maryland, Baltimore County, who has studied laughter, has noted in books and articles. It is frequently a social behavior unrelated to jokes or wit. It can serve different purposes. It can be friendly or submissive, hostile or dominant. Witness the old distinction between laughing with and laughing at someone."