After 1945 rapidly climbing figures of venereal disease infections menaced the health of the war-ridden German population. Physicians sought to gain control over this epidemic and initiated large-scale sex education campaigns to inform people about identification, causes and treatment of VD and advised them on appropriate moral sexual behaviour as a prophylactic measure. Film played a crucial role in these campaigns. As mass medium it was believed film could reach out to large parts of society and quickly disseminate sexual knowledge and moral codes of conduct amongst the population. This essay discusses the transition of the initial central role of sex education films in the fight against venereal disease in the immediate post-war years towards a more critical stance as to the effects of cinematographic education of the young in an East and West German context.