U.S. Government used during WWII to help fight the spread of sexually transmitted diseases among the military. "Men who know say no to prostitutes: Spreaders of Syphilis and Gonorrhea." Circa 1940. From the Vintagraph collection this Say No To Prostitutes Vintage Metal Sign measures 16 inches by 24 inches and weighs in at 4 lb(s). This Vintage Metal Sign is hand made in the USA using heavy gauge American steel.