I've come across the rape-is-just-another-word-for-seduction-and-it's-fun-for-the-ladies paradigm in other fiction/films from before the 80s often enough. There's plenty of it in the Beebo Brinker chronicles (legendary lesbian pulps), Gone With the Wind (never a good place to go for non-disturbing entertainment in the first place) and even in the 1998 Lisa Kleypas romance novel Stranger In My Arms (which had the good rape/bad rape dichotomy - the good rape is the one that gets the lady off).

It's funny to think that the idea that rape is, you know, not fun, is kind of a modern idea.