The ultimate nazi whore was Alma from L'Ultima orgia del III Reich (unfortunately one of the rarest video nasties of the 80s).



I couldn't find a bigger picture- but in this scene, she can be seen masterbating a guard as he watches a woman being eaten by dogs. She was supposedly modelled after a real life wife of some SS boss.
Anyhoo- I might make a review or do some screencaps later. Afterall, it kinda does border on the porn side.