The concept of "fotos de chicas" can be traced back to the early 20th century, when pin-up girls became a popular phenomenon. These images of scantily clad women were often displayed in men's magazines, on posters, and in calendars. The most iconic representation of this era was Playboy magazine, founded in 1953 by Hugh Hefner. Playboy's blend of men's lifestyle and entertainment magazine, featuring nude photography, became a cultural phenomenon, with its centerfold images of models becoming a benchmark for beauty and desirability.