Glamour photography or startled by the viewer. The subject would usually have an expression of delight which seemed to invite the viewer to come and play. During World War II pin-up pictures of scantily clad movie stars were extremely popular among American servicemen. Betty Grable was one of the most famous pin-up models of all time; her pinup in a bathing suit was extremely popular with World War II soldiers. In December 1953, Marilyn Monroe was featured in the first issue of "Playboy" magazine. Bettie Page was the Playboy Playmate of the Month in January 1955. "Playboy" was the first magazine featuring
Playboy coincidentally, a cropped image of the issue's centerfold (which featured Lena Söderberg) became a de facto standard image for testing image processing algorithms. It is known simply as the "Lenna" (also "Lena") image in that field. In 1970, "Playboy" became the first gentleman's magazine to be printed in braille. It is also one of the few magazines whose microfilm format was in color, not black and white. Playboy's iconic and enduring mascot, a stylized silhouette of a rabbit wearing a tuxedo bow tie, was created by "Playboy" art director Art Paul for the second issue as an endnote, but was