Pinup girls
A pin-up girl is a woman whose physical attractiveness would entice one to place a picture of her on a wall. Such photos often appear on calendars, which are meant to be pinned up anyway. Later, posters of “pin-up girls” were mass produced.
Many “pin ups” were photographs of celebrities who were considered sex symbols. One of the most popular early pin-up girls was Betty Grable. Her poster was ubiquitous in the lockers of GIs during World War II. Others pin-ups were artwork, often depicting idealized versions of what some thought particularly a beautiful or attractive woman should look like.
[Wikipedia]
Then there's Rita Hayworth, of the Shawshank Redemption fame
Doris Day and Bunny Yeager
Veronica Lake and Jane "whatswithdaexpression" Russel
And of course, Marilyn Monroe
Coming soon: Nose Art from World War II bomber planes.