Thank you for your comments. I particularly liked your thought that Harry was able to be superior when Ron and Hermione were going astray because he had Obliviated his own, equal sins! As for Severus, although he wasn't married, he nevertheless had been involved in a homosexual relationship, and that was regarded as pretty reprehensible back in the 1950s, married or not. I imagined the Wizarding World as stuck in a Muggle post-war time-warp, where the swinging sixties and its sexual revolution never happened for Wizards and Witches. That's the time-frame that JKR used for most of Magical society - boarding school with 1950's unadventurous stodgy food, steam loco hauling the Hogwarts Express, Diagon Alley's little old artisan shops, bureaucratic Ministry staffed by silly old codgers - all straight from the 1950s. I remember, you see, I grew up in that age of peering through net curtains at the neighbours. There was incredible gossip about our neighbour who sunbathed in her garden in a bathing costume, and women who wore trousers as casual clothing (as opposed to work trousers for working on the harvest etc) were considered 'fast' and unreliable and unladylike. Truth.