In every one of these posters about the dangers of venereal diseases (now known as sexually transmitted diseases or infections), men are being warned about women. Women are the carriers of syphilis and gonorrhea- particular women, that is: available women, pickups, good-looking stylish women who are alone or women in groups. Not mothers, homebodies, wives, daughters. And since these come from a war era, dangerous women are likened to the enemy and to weapons capable of ruining the lives of innocent, clean young men. This gender stereotyping (or misogyny) is only 70 years away.
These images come from 100yearsofsex.org.