I've gotten a copy of Sixteen Candles from the library, but it started skipping so I got it in the mail via Netflix. Both copies said it was PG.
I'm not even 15 minutes into the movie and they've already said "fuck" and have shown boobs and girl butt. BOOBS! Like a close up of boobs. I mean they weren't full on titties, but these were boobs! I see it marked as "R" in some places, but for some reason it's marked PG in a number of others, like this copy and the one at my library. I would have LOVED to have found this "PG" movie when I was ten years old.
For anyone not quite old enough, in pre-internet days it was much harder to see boobs. In fact you may go many days without seeing boobs. Many R rated movies were rented and watched not so much for the story, but for the chance of their being boobs. Back then other than seeing a movie with nudity you had to rely on magazines. Finding a magazine like Playboy, Penthouse, or Hustler was like finding gold.