In a family, you take on each other's problems and joys differently, and more intensely. The amplitude - and the undulation of the family - is different from the people you just generally bump into on the street, because you're chained together. And what happens if you break that chain? In almost every family that I know, someone has escaped, set themselves free, tried to run away - whatever what you want to call it. And often, they are made more conspicuous by their absence.