From The Art and Popular Culture Encyclopedia
If.... is a 1968 cult film by British director Lindsay Anderson about an armed rebellion at a British public school. The film is associated with the 1960s counterculture movement: it was filmed at the time of the student uprisings in Paris in May 1968, it includes controversial statements such as "There's no such thing as a wrong war. Violence and revolution are the only pure acts"; and features surrealist sequences throughout.
The film stars Malcolm McDowell and Christine Noonan. It features frontal male nudity in a shower scene by three of the film's lead actors. The female lead, Christine Noonan also appears nude, grappling with McDowell during a feral sex scene. There is also a surreal sequence of the headmaster's wife sleepwalking nude through the school hallways at night.