Marketing
One of the more memorable aspects of the film is the advertising campaign. The film underwent many name changes, including Sex Crime of the Century (from the characters' dialogue in the car ride scene), Krug and Company (a version included on the DVD release), and The Men's Room (simply because one poster showed a men's bathroom). None of these names were particularly successful. Someone then came up with the title The Last House on the Left, along with the infamous "To avoid fainting, keep repeating-it's only a movie..." advertising campaign. (In actuality, it had been used twice before: first in gore-meister H.G. Lewis's 1964 splatter film Color Me Blood Red, and then in William Castle's Strait-Jacket the following year.) The film under the Last House... title proved to be a massive hit. Stories as to where the advertising campaign originated vary somewhat. Sean Cunningham claims that the person giving the idea for it was watching a cut of the film with his wife, who continually covered her eyes, prompting him to tell her that it was 'Only a movie...'. Other origins have been suggested, however. The tagline was so successful that many other exploitation films later used it, sometimes with own spin. The title was sometimes imitated, as in the case of Last House on Dead End Street.
Read more about this topic: The Last House On The Left (1972 film)