Wikipedia and IMDb notwithstanding, this film is not from 1938. The production values, music, hairstyles, clothing etc., are all from the early 1930s. "Sex Madness" started out as a stage show and began screenings as a film sometime in 1934; that is why the title card on vintage prints has a copyright date of MCMXXXIV, or 1934. A search of the Newspapers.com database returns numerous citations for the years 1934-37. For instance, Page 7 of the 3/6/34 edition of the Passaic (NJ) "Herald-News" refers to "advertising used outside the Playhouse Theatre in connection with the motion picture 'Sex Madness'." Page 12 of the Pittsburgh "Post-Gazette" of 4/3/36: "It is true that certain pictures have been banned from the screen in our state (that had been released by producers): 'Sex Madness,' 'No More Children,' 'Streets of Sorrow,' 'Potemkin' and others." Etc. etc.
Rejected by the state film censor boards in New York, Pennsylvania and Kansas on its initial release.
The sexually transmitted disease in this movie, syphilis, is an infection caused by the bacterium Treponema pallidum subspecies pallidum. The signs and symptoms of syphilis vary depending in which of the four stages it presents (primary, secondary, latent, and tertiary).