According to Paul Di Filippo, Delany sought to push the boundaries of heteronormative sex. Delany's novel Hogg, written in 1969, is also full of detailed descriptions of incest. The book debates cousin coupling at a time when it was a highly contested topic. Cousins (1879) by Lucy Bethia Walford, a fictional story of Simon who romances his cousins.The 120 Days of Sodom (1785), Philosophy in the Bedroom (1795), and Juliette (1797), all written by the Marquis de Sade, are all full of detailed descriptions of incest.John Ford's 'Tis Pity She's a Whore play (between 16) is one of the earliest examples that generated much controversy.
