Alberto Vargas was a Peruvian painter who was hired by Esquire Magazine to create calendars featuring female models. These pages were intended for informal display by being pinned up on a wall, thus the term pin-up. The girls that modeled for Vargas became famous and were affectionately referred to as the Varga girls. During World War II. American GI's frequently copied pin up images to put onto their aircraft as a symbol of good luck - since the Varga girl, through her poses and expressions, conveys serenity suggesting that all will be well.