Pornosec, the sub-section of the Fiction Department which turned out cheap pornography for distribution among the proles. It was nicknamed Muck House by the people who worked in it, she remarked. There she had remained for a year, helping to produce booklets in sealed packets with titles like ‘Spanking Stories’ or ‘One Night in a Girls’ School’, to be bought furtively by proletarian youths who were under the impression that they were buying something illegal.

— George Orwell, 1984, chapter 3