You are a US Citizen and you do not have a proper sense of humor. Don’t worry, it’s not your fault. After studying 2,000 pairs of British twins and 500 pairs of Americans, researchers at the University of Western Ontario in Canada â’“ not a nation famed for its home-grown jokes â’“ concluded that humour lies in the genes. Both nations, the researchers found, liked positive humour, but only the British appreciated sarcasm, self-deprecation, teasing and ridicule, and the less pleasing aspects of racist or sexist humour. Television humour in Britain is more biting, whereas in North America it...