This is one of director Joe Sarno's more tepid films. Ostensibly, it is about two sisters, orphans who both work as prostitutes at the bizarre Copenhagen brothel of their "Aunt Margareta" (Diane Dors) where, among other things, the girls all dress up in skin-tight suits as various wild animals and the clients chase them around with giant butterfly nets. The sisters are renown at the brothel/showclub as the "famous Swedish sisters". The problem is though they really look nothing alike, and their main act seems be posing as topless "executioners" who tie a third, completely naked woman up, so a male "executioner" can whip her. Why you need two "Swedish sisters" to do that is beyond me. And even in the bedroom afterwards only the older sister is very skilled at, uh, pleasing the clients. It would seem to make a lot more sense to have two genuinely talented performers/prostitutes and have them just PRETEND to be sisters, but oh, well.
The "plot" involves the two sisters both meeting men outside the brothel. The older sister meets a shipping clerk while walking in the park. He tells her he's a pilot; she tells him she's a Russian ballerina. Then the man's mean-spirited boss lures him to the brothel where both their lies blow up in their mutual faces. The younger sister meanwhile meets a rich American--entirely offscreen mind you--and then just completely disappears halfway through the movie!
Although the plot obviously isn't one of them, this movie does have a few things going for it. Diana Dors is very good. Unfortunately, her character is not very well-developed--she's too amoral and money-grubbing to be sympathetic, but she never does anything REALLY evil either. (Former glamour queen Dors was also none-too-svelte at the time, so it kind of beggars belief that she's so popular with the clients). The movie also features Swedish sex bomb (hell, Swedish sex NUKE) Christina Lindberg. Regrettably, she has only a very small role though and only one brief nude scene. Finally, (descending entirely into the realm of strange personal fetishes) this movie also features a nude belly-dancing scene. I have lived in Turkey where there is not enough nude dancing, and the US where there is not enough belly dancing--but nowhere in the world is there NEARLY enough nude belly dancing. I don't if you can really take any of this as recommendation, but it's all I got. . .