Deep Throat

The quintessential porno flick, its mere name immediately brings to mind what the film was about (providing blow jobs to men) although allegedly there were other things in the film. (The only part of the movie I saw was the opening scene where a car is driving past trees, this apparently being the only part of the film they could show when 60 Minutes did an article about it.

While it was quite the trendsetter at the time, launching a genre that The Other Wiki refers to as porno chic, it's real claim to fame was the connection with the Watergate scandal. For decades, we only knew Woodward and Bernstein's informant, Mark Felt, by the code name of "Deep Throat". The fact that his information on the Watergate Hotel breakin led to the downfall of Richard Nixon only enhanced the mystique of the film, keeping the name of the porn flick on the news for years to come.

The director of Deep Throat was Gerald Damiano, who apparently spent less than $100,000 to make the film, and made millions. At least one theater in Los Angeles ran it in a double feature with Devil and Miss Jones every day for eight years until the theater was torn down. Some theaters ran it with Behind the Green Door.

Linda Lovelace was the female star, and for some reason, Ron Jeremy, who merely appeared in the film as an actor, was prosecuted over the displaying of the film in theaters, supposedly because it was obscene.

Those who've actually watched it can include the tropes it used below:

The Book Of The Film: There was a book adaptation, believe or not. It had no pictures.
Hilarious In Hindsight: A movie about oral sex would hardly be controversial today. (Unless Lovelace's claims are true.)
You Fail Biology Forever: The whole premise of the film was that Lovelace's character had a clitoris inside her throat. Admittedly the movies lampshades this as incredibly unusual.