My much older sister, by 11 years or so, took me to see a Richard Pryor movie once when I was about 7 or so. I don't remember the name of the movie, but I remember a lot of sex, nudity and many variations of the f-word. The only scene I remember specifically was somebody having sex with the woman being held up with her back against the door by the guy who was doing her. It never occured to me that you could do it that way until then. It was very educational.
Other than that I remember seeing stuff like the Apple Dumpling Gang, and something about Blackbeard that I didn't really get, at the theater. Sgt Pepper was pretty cool too, although I wasn't on drugs yet so I didn't get a lot of it. Oh yeah, and I really liked Herbie, The Love Bug too.