"Did you take care of your breasts? Strengthen your nipples by washing
them daily with cold water." In the early 20th century a popular belief was that bathing in frigid water was a good way to harden the body, like tempering a blade in flame. Talk about a cold war! More 1900's Soviet ads here. If you click on the gallery pictures you can also send the posters as e-cards to your comrades. via.