I saw this movie on Cinemax back in the early 90's. I didn't see the whole thing. Well, what I saw was this guy gets this woman to come over to his apartment. He somehow ends up chaining her hands over her head to the wall. He explains that he loves her and she will be his. He then strips her naked and begins torturing her. One way is he tickles her for a long while with a feather. Somehow over the course of the movie, the woman ends up falling in love with him.
I remember one scene in particular. The police or something come into the apartment. The woman tells the man she will remain perfectly still and pretend to be a statue. Before answering the door, the man tears a big leaf off one of the plants, licks it and places it on the woman's crotch. The police, or whoever they were, come in and talk for a little while. They make a comment like, "what a realistic looking statue," and then they leave. In the end, the man and woman hook up. I vaguely recall them in bed together, and another guy comes out of the wall with a knife. He then looks at the couple having sex and just walks away.
I was young watching this, and kept the sound low so my parents wouldn't know I was watching a movie like this. So I'm not entirely sure on the dialogue. The man that ties the lady to the wall looked like a young Tim Curry, but it's not him. I checked his IMDB page. The woman chained to the wall had red hair.