The Honeymoon Killers, 1970, the real folie a deux

At first sight one might assume that The Honeymoon Killers (1970) is just another exploitation film. After all, its poster looks cheap and provocative: an obese woman, in her underwear, receives the passionate caresses of her lover... all done with a black and white photograph, and a two-color background (white and pink). It looks like a story of fetishism and forbidden passions... until we see th