The Marquis de Sade (1740-1814) was a thinker and pornographic writer who would have appealed to Jimmy Saville. We could argue that both men lived in a similar story/narrative. Perhaps we could say that Thomas Hobbes and his many disciples had 'seduced' both men! Mugged by the materialist creed?
I do not know if Saville read the Marquis but their faith in 'nature' is strikingly similar. There is only one difference that I can detect. Saville claimed to be a Roman Catholic but De Sade openly despised Roman Catholicism.