Lusts of a Moron, by Momus, is not exactly literature but it is a pleasurable cross referencing bonanza in to the mind of a true savant.  Nobody drops more cultural  knowledge into a single song then him.  Take for example, the lyrics to Bluestockings, a song about the dirtiest books ever written. If I were looking for a dirty book suggestion, this song would be a good place to start.

I love you, you're so well read
Blue stockings well spread
Your carnal knowledge knocks me dead

I love you, you're so well read
Bluestocking give head
I love you, you've read:

Ovid, Anaïs Nin
The Song of Solomon
The Perfumed Garden and Georges Bataille's
The Story of the Eye
The Petronius Satyricon
The Arabian Nights, the Decameron
The Marquis de Sade's 120 Days
And Serge Gainsbourg singing songs to Sweet Jane B

I love you, you're so well read
Blue stockings well spread
Your carnal knowledge knocks me dead

I love you, you're so well read
Bluestocking give head
I love you, you've read:

Sacher Masoch and DHL
Portnoy's Complaint and mine as well
Frank Harris, The Life and Loves
Lusts of a Moron, Wings of a Dove
The Latins of the Silver Age
The triolets of Paul Verlaine
Lautreamont and G. Cabrera Infante
Mishima Yukio and Sweet Jane B

I love you, you're so well read
Bluestocking give head
Whisper what they said:

"Le silence de la chambre est profond
Aucun bruit n'arrive plus
Ni des routes, ni de la ville, ni de la mere
La nuit est a son terme, partout limpide et noir
La lune a disparu
Ils ont peur
Il ecoute, les yeux au sol
Son silence effrayante
Il parle de sa beaute
Les yeux fermees
Il peut revoir encore l'image dans sa perfection"

There are more than a couple heavyweight authors named here. My Life and Loves by Frank Harris, a monster of a book that was banned in countires around the world is one that we keep on our shelves. Harris was an Irish born journalist, author, editor, publisher and one-time roommate of Aleister Crowley. He moved to New York and founded his publishing company, The Frank Harris Publishing Company, to promote and distribute his works in America. Those works are now part of the collection at Princeton University.

On a side note, other books suggestions pertaining to the genre come from Susan Sontag, who credited the following five erotic novels as "true" literary works.