Many have wondered if the graphic sex scene between Donald Sutherland and Julie Christie in Nicholas Roeg's Don't Look Now was actually real. It certainly looks pretty real, and moreover, a new book by Peter Bart, former editor of Variety, says it was. According to his Infamous Players: A Tale of Movies, the Mob, (and Sex), Bart visited the set in 1973 and saw things that in filmic terms went "beyond coverage."
The Daily News has the book and quotes Bart saying, "It was clear to me they were no longer simply acting: they were [having sex] on camera." (What colorful former-editor-of-Variety-type language is the News obscuring there, I wonder?) This was displeasing to the lovely Christie's then-boyfriend, Warren Beatty, who insisted that Roeg edit the scene. (He wasn't the only one; the studio wasn't too psyched about the whole thing either.) Of course, Warren Beatty being Warren Beatty, he was probably doing okay for himself.
UPDATE: Sutherland denies it.