A square-up was a common feature of exploitation films in the 1940s and 1950s. With the exception of most burlesque features during the 1950s, the films would begin with a written message about what social or moral issue the film was planning to address. For instance, She Shoulda Said No! contained a square-up concerning youth drug abuse, and Chil...
Found on http://en.wikipedia.org/wiki/Square-up
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