Not to help confirm or deny the assumption but - not all sex scenes are filmed before a full crew. Most are filmed on a closed set with only the Director, camera man and maybe a gaffer present. There are some mainstream films with real sex involved. I worked on a set 6 months ago where the actress was very comfortable with her body and had no problem with nudity. We locked down the set and were very respectful of her privacy but she insisted she didn't need a towel between takes or for us to leave. Shortly after that wrapped she did an arthouse film which featured explicit sex scenes. Some actors are dedicated to their work
"I saw the best minds of my generation destroyed by madness"

I'm pretty sure he was married when he shot those scenes, so I doubt they'd be real as that would be cheating.

He does have an intensity that makes one believe he is the character. I will admit too real at times.

Yes I realize, but there is such a thing as method acting. Hey, it makes me none the happier if it is or it isn't real. Just saying it looks very real.

If that makes you happy, sure. Can't think of a bigger turn on than lights, camera, action and a dozen crew members around! It's work, not a picnic in the park.