The term "Pin-Up Girls" derives from a trend that was clearly perceived in the 1940s and 1950s in the United States. It concerns posters hung by men from various social classes (most often by blue-collar workers or soldiers, but not only!) With specifically dressed and make-up women with a clear erotic tinge. Let us add that although these posters were erotic, they were not treated as pornography, which was forbidden in the US at that time. These "Poster Women", that is, the pin-up girls, were always smiling; they wore either flared, loose polka-dot or striped dresses, very skimpy underwear, or bathing suits. They were often depicted wearing high-waisted shorts. Of course, the Pin-Up Girls outfits were presented in such a way as to reveal as much of the models' bodies as possible. Let us add that many official photos of Marilyn Monroe are kept in this style. The makeup used was also very clear, with red lipstick underlined on the lips and strong black lines above the upper eyelids. It is worth adding that, since the beginning of the 21st century, there has been a noticeable renewed fashion for styling and makeup in the spirit of Pin-Up Girls.