A Pin-up Girl is a man’s ideal of the “perfect woman.” Men want to look at them and women want to look-like them. Pin-Up girls have been around since the 1890's but became most popular in the 1940's. Many “pin ups” were photographs of celebrities who were considered sex symbols.
Pin-up girls represented everything an average woman aspired to and reflected a glamorous side of life that seemed to be missing in the forties and fifties. These Images could be found almost anywhere; magazines, calendars, posters, newspapers, postcards or even in chromolithographs. Later, posters of “pin-up girls” were mass-produced. (Militaryspot.com)