It seems like there's a turning point in every kids life when they see their first R rated film. For me, the rating means they didn't cut back, or try to soften something to make it more family friendly. I think everyone has that point, where they see a movie that is nothing like they've been allowed to see before, whether it has graphic violence, hard core sex, or explicit suggestions to go fuck yourself.
My first R movie was Office Space
It was the greatest movie I'd seen up to that point in my life. It was hilarious and used the English language to it's fullest.
The Terminator. It was on New Years Eve when I was eight years old. After some cop confiscated our fireworks, the parents decided that to cheer us all up they would let us watch the movie. I was quite surprised when it showed Linda Hamilton's boobs.