I never encountered any of the things you list, growing up, and would have been shocked if I had. There's a tendency to overgeneralize a culture based on one's own subculture -- or perhaps you're even assuming things after watching too many '80s movies.
I am speaking from experience. I don't know anyone growing up who didn't have a friend share a Playboy with them, see risque things on TV, or when dial up was a thing, did not use the Internet to search for "boobs".
