This film is an answer to anyone who has ever wondered whether it is possible to make a film where erotic scenes form an organic part of a drama without somehow overbalancing it.
For me, the only such scene that actually worked was number two, where the "innocent" of the two female leads is talked through masturbation. The opening sex show sequence left me cold, despite the obvious qualifications of Coralie Revel, and the subsequent ones became, again for me, less convincing as they became more ambitious. I should say here, so that we all know what we're talking about, that none are hard core or explicit: there is a glimpse of an erect penis in the totally unconvincing orgy scene at the end, but no visibly penetrative sex.
That brings me to another question. Now that the Internet is awash with free pornography, will soft porn scenes titillate the viewers at all? I think not unless they are very well done, as is the one that I mention above, where Sabrina Seyvecou shows herself (if you'll forgive the expression) to be a superb actress. It seems to me that having spent the last fifty years tempting cinemagoers in with steadily more explicit sex scenes, the industry really has reached the point where it's just not going to work any more.
However, this film has more going for it. It's a very odd mix of soft porn and serious drama and the serious drama, with typically French existential musings towards the end (including the use by the demonic hero Christophe of the passé simple) is on the whole remarkably well done. I should also add, for the benefit of anyone following the French dialogue, that the French is good, so despite the fairly humble social circumstances of our two upwardly-mobile heroines, this is really a bourgeois film.
So does it work as a serious drama? I think it does, though as is so often case with films that set out to be titillating, enjoying it does require a certain suspension of disbelief. The behaviour of the women didn't strike me as psychologically convincing and that does matter, not just for the drama but for the sex scenes as well. For me, if women are behaving like no women I've ever met, I find it unconvincing on any level.
Finally, as other reviewers have said, the film does fall down towards the end and its whole drift becomes overblown, though the cultural references to Egyptian and Roman times are, I take it, intended as a justification for the incest of Christophe with his sister. These final scenes do, however, underline the emptiness and futility of a ruthless pursuit of erotic pleasure. On the whole, this film is a remarkable piece of work that deserves to be seen.