We can say, with certainty, that Harvey's childhood was almost the complete opposite of Susie's. In Mr Harvey, we see a yearning for an idealized home, and family, in his chosen profession: building dollhouses, idealized homes in miniature. His success gives him what his father's building couldn't, financial security. Harvey makes enough to buy that family home in the suburbs, but he has no intention of filling it with a family of his own. Rather, it becomes the disguise which allows him to infiltrate the 'fantasy' realm he covets.This therefore represents Catharsis, because Mr Harvey finds relief in the objects he never had as a child.