People use term film noir to describe crime dramas, the main task of which to emphasize sexual motivators. Film noir usually regard as extending. This movie genre became popular on 1940s. Films of this era usually associate with a black-and-white visual style. It roots in German cinematography. Many stories, which were prototype of this movie, derive of crime fiction. Sometimes people call this film genre dark or black movie. In 1946 Nino Frank unrecognized by film industry of new era. Critics tried to define this category of movie retrospectively. Before this notion, widely adopted in the end of 1970s. Many classic movies noir referred as melodramas. There are some subgenres of this film genre. For example, private investigator or plainclothes police officer. Some people like such movie genres as aging boxer or hapless grafter.