Absolutely explicit literature-stolen escape into mindless lust. Fics written out of Blyton, King Arthur stories, fairytales.. The unexpected, and the momentary, and whatever speaks to your crotch.
Genres so far, uptaken and suggested, read thus: Arthurian Tudor/Stuart Victorian Imperial real Biblical Classic (eg. Greek mythology) Music Hall Exotica Noel Coward-era Bohemiana Blyton pre-Raphaelite fairy-tale (the obligatory) Lord of the Rings & Harry Potter