They do not perform, but rather are judged on their authenticity, originality, overall styling presentation, crowd appeal, and stage presence.
The term was first attested to in English in ;  however, the practice is documented back at least to the s.
Pin Up Girl Drawing
Prior to World War II they were praised for their beauty and less focus was on their sexuality.
Description: According to Joanne Meyerowitz in "Women, Cheesecake, and Borderline Material" an article in Journal of Women's History , "As sexual images of women multiplied in the popular culture, women participated actively in constructing arguments to endorse as well as protest them. Pin-up modeling is a subculture that is invested in promoting positive body images and a love for one's sexuality, "