Compartmentalising his life allowed Ralph to lead separate existences, each with his own truth. He pictured it like the old-fashioned train carriages that were just being phased out, where there was no corridor or link between compartments; you merely entered and left at the platform. Using this model, his obsession with Daphne had no impact on his love to Nina and Jason. He would never abandon them and explained this to Daff. It was entirely possible to love more than one person at the same time and neither relationship had to compromise the other.