Cheesecake pictures, also known as pinups, are photographs of attractive women that were popular in the early 20th century. They were often used to decorate walls and other surfaces, and were seen as a form of art. CHEESECAKE pictures were usually taken in a studio setting, and often featured women in provocative poses. The term 'CHEESECAKE' was first used in the 1920s, and is still used today to refer to these types of photographs.