The film is about a couple freeing themselves from repression and discovering whether their relationship can survive a regeneration of sexual desire on both a spiritual and physical level. Kubrick based the film on Arthur Schnitzler's Traumnovelle, a novella of sexual psychoanalysis of a married couple. Schnitzler was good friends with Freud and came out of the same cultural milieu.
I liked the film. Although I don't think that Kubrick (unlike Greenaway) had the sensual ability to create a deeply sexual film, and I really don't understand why they had to set the film in contemporary New York as opposed to fin-de-siècle Vienna, he did a reasonably decent job of presenting of some sort of sexual tension on the screen. It was OK. I haven't read the book, but I'm sure it's a lot better than the movie.
later............