That's not our culture today. That was the culture 29 years ago.

Her reaction and enjoyment at a later time is immaterial: It's rape (or sexual assault, depending on jurisdiction) to have sex this way.

Rape and sexual assault are something you can pick out before you engage in them.

>it's a fun movie and not a manual for life.

It certainly can be a fun movie and have misguided lessons for people. Many old pieces of art do this, but are still enjoyable in other places. That said, the bad parts should still be pointed out clearly as bad, even if it taints enjoyable experiences of our youth. They aren't harmless. They normalize this crap and convince young fools this type of thing is fun instead of criminal.