Explicit content/profanity/violence in film

[Alfred]

Title is a bit misleading, because the purpose of this thread is a bit more specific than that. This thread is more about the gradual, increased acceptance of explicit content in film, the rating system, etc. Hell, it can be about ground being broken technically, aesthetically, etc if that's what you want to discuss.

To get the discussion rolling, here's a few questions.

-What was the first use of the word "fuck" in an English language film?
-of full frontal nudity?
-of graphic dismemberment?

I guess my main point of interest here is the "New Hollywood" period. There's a huge difference in the amount of explicit or violent content between early 1960's films like Psycho, The Great Escape, and The Magnificent Seven and late 1960's/early 1970's films such as Bonnie and Clyde and The Exorcist. Even to compare two of Sam Peckinpah's films, Ride The High Country (1962), and The Wild Bunch (1969), one notices a great increase in graphic violence, abrasive dialogue and characters, and other explicit content.