There’s a fine piece at Nitrate Diva about the 1935 film, Kongo. “In this monument to morbidity, nearly all the taboos festering at the edges of pre-Code cinema come out and play: blasphemy, drug addiction, prostitution, torture, slavery, bestiality, and (spoiler alert!) incest. The movie positively wallows in depravity. Degradation is its subject, its project, its study.”