‘The problem,’ Gary said, ‘was that the schizophrenics had incredibly vivid dreams – dream after dream after dream – but the psychopaths would be lucky if they even had a dream.’ ‘Why do schizophrenics dream more than psychopaths?’ I asked. ‘I don’t know,’ Gary laughed. ‘I do remember the schizophrenics usually dreamt in colour – the more intense a dream the more likely it’s going to be in colour – but the psychopaths, if they managed to have a dream at all, dreamt in black and white.’