I read a detective novel from time to time but imagine how amused I was when I "finally" read Chandler's The Big Sleep. The novel, of course, filled in the gaps that no movie made in the late 1930s could be honest to reveal: that the detective Phillip Marlowe was investigating a porno-racket that was blackmailing the father of nymphomaniac Carmen Sternwood. The novel wasn't great but knowing all the little details made me appreciate and understand the film better. In this scene private detective Marlowe disguises himself as a prissy homosexual to get a better inside view of the porno-racket: