For Adolf Hitler and Heinrich Himmler, it was a straightforward matter of protecting their troops from venereal disease.   For everyone else, well, not so much.

Having a pathological fear of syphilis (which he likely had himself), the Fuhrer was determined to ensure that the Germans serving under him could indulge themselves without the risk of infection.  And infection was a legitimate risk as it was.   Following the occupation of France, the French brothels were a prime breeding ground for the kind of diseases that could remove a soldier from active duty.   In a letter written by Heinrich Himmler on November 20, 1940, he stated that:  "The greatest danger in Paris is the widespread and uncontrolled presence of whores, picking up clients in bars, dance halls, and other places.  It is our duty to prevent soldiers from risking their health just for the sake of a quick adventure."    Sources have pointed out that French prostitutes infecting German soldiers accounted for more losses than many divisions of the Allied Forces. 

To counter this threat to German health, Himmler and Hitler launched what would be known as the Borghild Project in 1941.   Designated "more secret than top secret", the project was run by Himmler's commander-in-chief, Dr. Joachim Mrurgowsky of the notorious SS Institute.  The purpose of the project was to create what was essentially the world's first sex doll for German troops to use instead of prostitutes.