The End of the Road (1919)

Childhood friends Mary Lee and Vera receive two different versions of the 'birds and the bees' from their mothers: Mary Lee gets the facts; Vera gets a prudish fairytale version. Their lives separate after graduation, Mary Lee becomes a nurse who falls in proper love with a Doctor, whereas Vera follows her mother's advice and seeks to marry a rich man, but falls for the unlawful, syphilitic charms of a wealthy cad. Mary Lee and her Doctor rescue Vera and help her get proper care after a series of revelations showing actual patients of the loathsome disease. Finally, Mary Lee and her new husband volunteer to help our boys fighting the Huns in France.