What does the porno-chic era have in common with French existentialism? Well, there's this movie called the Devil in Miss Jones (don't worry, that's the link to the wikipedia page. Definitely SFW). Alternatively, there's the dress code for a valentines day party last weekend. Sartre+70's+lascivious business = something for everyone. Poster, anyone?
p.s. the back of the poster was this.