After stimulus-hunger and recognition hunger comes structure-hunger. The perennial problem of adolescents is : ‘What do you say to her (him) then ? And to many people besides adolescents, nothing is more uncomfortable than a social hiatus, a period of silent, unstructured time when no one present can think of anything more interesting to say than: ‘Don’t you think the walls are perpendicular tonight ?’ The eternal problem of the human being is how to structure his waking hours. In this existential sense, the function of all social living is to lend mutual assistance for this project.