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It originated as a spin-off of pin-up calendars (which were ubiquitous in the United States during the 1930s-1960s)... AnonMoos ( talk) 01:08, 7 January 2014 (UTC) reply

In a Simpsons episode, Marge posed for one... AnonMoos ( talk) 07:35, 7 January 2014 (UTC) reply