Most people that comment here take the film and story serious as if it has to have taken place or something, to begin with! Look, I saw this film late at night and as a big Bruce Willis fan I liked it. And believe me, I'm not a moron, there's nothing wrong with me. I just liked this film, it was good entertainment (just what a film is supposed to do), good thrilling, (just what a thriller should do!) and good acting. Nice of Brad Dourif to drop by in this film, I remembered him from One Flew Over the Cuckoo's Nest (Billy) immediately.
Now for the story, I think character building was adequate. Of course you must not think too much. No psychiatrist would visit their patients at home and there is more that doesn't add up, but never the less, I was surprised with the end. People are getting killed and the killer is out there, really close to the main character. You really don't know who did it, all though you have your hunches. And that makes a thriller worth while, I think. And about eroticism, this film has stuff for him and her. Bruce really looks great in jeans and you get to see him naked here! And Jane March is stunning, also naked. Beautiful sex-scenes and nicely edited. The film has a nice chase too, a Mercedes SL against a Camaro or Trans Am.
Advice: see this film and judge for yourself! (and write it down here!) Switch your senses off and just let yourself be entertained. You'll see, you'll like it!