Most people here think this is a dud. I disagree with them, but I also understand them completely. I think the problem with this movie is: it has been made for a very small group of lovers of the grotesque only. Everything is parody: the clothing, the 1960's colours, the 'special effects', the acting. This movie not only mocks Barbarella, but all science fiction movies made in the 50's and 60's, all adventure movies of the same period and all logical thinking.
Especially the first twenty minutes of this movie contains enough mad ideas by the makers to make twenty complete movies. But they don't and pack it all in just twenty minutes. Just wait till you see the special effects, the announcement for the James Bond movie (coming to this theatre soon), or the king(!) giving birth regularly.
Only people who love the more bizarre bits of Monty Python will stand this movie. And my guess is they will be fascinated, especially during the first 20 minutes or so. All others will gasp for a while with their mouth wide open and will then reach the conclusion: this is rubbish. And I don't think there is a way in between these views. Oh, by the way: in spite of the title this is not porn, nor it is a sex movie. If one has to categorize this movie, it is fantasy or a fairy tale. So don't let the title misguide you.
I loved the movie for what it is: an over the top parody of various genres, packed with bizarre, grotesque ideas. Thus I rate it 7 out of 10. But don't feel ashamed if you don't get the drift of this one, for it is all... Monty Python gone berserk.