Movie ratings were different back then though. Even Jaws was a PG.
Rocky (1976). Features intense makeout scene. PG.
Logan’s Run (1976). Features open female nudity and overt creepiness. PG.
Temple of Doom (1984). Features a guy’s heart being ripped out of his chest. PG.
Edge of Tomorrow (2014). Harmless action movie. PG-13.