It's funny, but if memory serves, the greater appeal of the book, and by extension the sexual content contained therein, was that like other romance novels, women could process the images using their imagination, which according to many articles that come out after the original book, is the method that makes it appealing to them. This as opposed to men who prefer the visual method. By taking it to the big screen, you make it visual, the imagination element is gone, and with it...the appeal of the whole thing for women. Of course, men were bound not to like it due to the "Twilight" similarities to the surrounding story.
So, I am not surprised to hear that a higher percentage of women that I know that enjoyed the book(s), saw the movie and did not like it. This one will make a lot of money out of curiosity, but now that the verdict is in (for the most part), the second, and third ones will have a hard time trying to recapture an audience already lost. I am sure there are exceptions to all of the above, but by and large, the response has been pretty one sided in my neck of the woods.
*Disclaimer: No statements made above are intended to be construed, or implied as sexist, or denigrating to either sex. You can never be too careful when commenting on things of this nature. ;-)