Why do we laugh? What is comedy, and what is humour?
Which theory of comedy is closest to the truth? The so-called 'superiority theory' of the ancients, who thought we laughed when we felt superiors to others? The more modern incongruity theory, which believes that unexpected difference is the source of humour? Or perhaps the psychoanalytical idea, as championed by Freud, that laughter represents the bursting out of previously-repressed mental energy?
Or perhaps none of these really hit the mark. What do you think?