The editing in many of the sex scenes is poor, with the use of body doubles being too obvious.
In the opium den scene, opium pipes are handed around much as if they were tobacco pipes. In reality, opium is a sticky substance that cannot burn on its own. A drop is fastened near the hole in the middle of the metal head of the pipe, and it is then held with the head down over a spirit lamp, the opium evaporating over the heat as the smoker inhales. In this movie, the pipes are held with the metal head UP instead of down, no opium is ever visible near the hole, and no spirit lamps are used. Yet the women miraculously manage to get smoke out of the pipes.
In an announcement that the Germans troops were near to Paris (June 1940) it is also stated that the French government had decreed the total mobilization of the reserves. Actually the mobilization of the French armed forces had been decreed in September 1939, when the war started.
Part of the action of the film is supposed to take place after the German invasion of the Netherlands and Belgium, towards the end of May, 1940. However the trees are still without leaves and the actors wear winter clothes.
In announcing the invasion of Germany, it is stated that the German army has invaded Belgium and crossed the French border, occupying the city of Lille. In World War I the German troops crossing into France were advancing first towards the Somme river. It is only later, in their advance towards Dunkirk, that Lille was occupied.