Humour or humor (see American and British English spelling differences)'s the tendency of particular cognitive experiences to provoke laughter and provide amusement. Many theories exist about what humour's and what social function it serves. People of all ages and cultures respond to humour. The majority of people are able to be amused, to laugh or smile at something funny, and thus they're considered to have a "sense of humour." The term derives from the humoral medicine of the ancient Greeks… (More on Humorous)