You know there are some scenes where the actors have admitted years later it was pretty much the real thing.
In "Tattoo" Bruce Dern says that he and Maud Adams actually had sex.
Adams has denied it.
In Dern's autobiography he thought it would be "rude" if he WASN'T aroused.
So he said/ she said.
I've read where Jack Nicholson wished that A-list actors COULD show actual intercourse.
He thinks it would "enhance" the movie-goer's experience.
As Jack of course would.
TBH, I have always thought that ALL Hollywood people were immoral creeps with no compass.
I'm not judging, but I just *assumed* that everyone was actually "doing it" on screen.
It never occurred to me that someone in Hollywood would actually have some kind of "morals".
Think of how many starlets used their bodies in exchange for fame.