The phrase pin-up refers to the use of those shots and drawings for being pinned up on walls in a casual Exhibit. They also appeared frequently all through war instances being a morale Increase. They typically appeared in calendars or as postcards.??u ??n d? th?t d?r??tl? fr?m th? w?b??t?, w?th ?l??r ?n?tru?t??n? f?r ?ndr??d u??r? fr?m ?nd??. ?h? ?