"Sex Madness" (1938)

Sex Madness (1938) is an exploitation film directed by Dwain Esper, along the lines of Reefer Madness, supposedly to warn teenagers and young adults of the dangers of venereal diseases, specifically syphilis. Wild parties, lesbianism, and premarital sex are some of the forms of 'madness' portrayed. The educational aspect of the film allowed it to portray a taboo subject which was otherwise forbidden by the Production Code of 1930, and its stricter version imposed by Hollywood studios in July 1934.

This was released two years after "Reefer Madness," and has the same producer and style.  Those interested can view the entire movie at this link [Warning: boring].

Via Sloth Unleashed.