Hi there, I have seen a film, I think it in 1990s or 80s, I'm not sure. About a man who love watching his wife having sex with another guy through a one-side mirror wall. This is turn him on too much. He did't sleep with her unless he watch her make sex with another. IS ANY ONE KNOW THE NAME OF THIS MOVIE?
I'm tried searching for it but I couldn't find it.
I'm sorry for the grammar, I'm not a native speaker.

Worth a try - It might be this one, except he watches via a TV...

Animal Instincts (1992) - Plot summary (http://www.imdb.com/title/tt0103696/plotsummary)