Wehrmacht soldiers undergoing short-arm inspection.
“Short-arm inspection" in the military is the practice of medical examination of soldiers’ genitals for sexually transmitted diseases - "short arm" referring to the penis. The exact origins of the term are uncertain, though there is evidence of it being used in the Austrian military as early as WWI.
So now you can all go and google that for fun.

Wehrmacht soldiers undergoing short-arm inspection.

Short-arm inspection" in the military is the practice of medical examination of soldiers’ genitals for sexually transmitted diseases - "short arm" referring to the penis. The exact origins of the term are uncertain, though there is evidence of it being used in the Austrian military as early as WWI.

So now you can all go and google that for fun.