International 4-8818 is apparently a naturally happy person, who's capable of spreading that happiness to others. But society is apparently so tightly controlled that one isn't even allowed to be smile "without reason." If the people in society were actually happy, and if society genuinely wanted them to be happy, why would they worry about people smiling? Perhaps because, although everyone is supposed to be happy, no one is supposed to be happier than others, and whenever an individual is happier, that's always a danger. So no individual is supposed to be happier than any other, but everyone's supposed to be happy.