Denis Diderot 
Les Bijoux Indiscrets, or, The Indiscreet Toys 

This is an allegorical novel by Denis Diderot that tells the story of Sultan Mangogul of Congo, who is given a magical ring that makes women’s vaginas talk. The story follows the Sultan as he uses the ring to uncover the amorous experiences of his mistress and other women at court. The novel is a satire on the sexual mores of the French aristocracy during the reign of Louis XV and is notable for its explicit and often humorous depictions of sexual encounters.