Alexandre Dupouy is a French collector, who spent his entire life collecting “erotic and pornographic junk”. In 1975, he received a call from a bookseller friend who said that he had an old gentleman with “something special to show him”. What he had was a luxury car with a boot full of black and white photographs of naked and smiling prostitutes from the 1930s. He explained that he took most of the pictures in a brothel on the Rue Pigalle, during the inter-war period. Nearly four decades later, Alexandre Dupouy decided to reprint some of this impressive collection as a book called Bad Girls.