What did Marlon Brando intend to convey by his acting in The Last Tango in Paris? [closed]

The movie was initially X-rated and banned in some countries. Perhaps some make the distinction between porn and 'porn with a point', tho the point may be too small for others to readily see.

Here are two interesting review excerpts [I enjoyed reading them in full] that express the movie's trip to the dark side of human nature.

https://www.rogerebert.com/reviews/last-tango-in-paris-1972

For the movie is about need; about the terrible hunger that its hero, Paul, feels for the touch of another human heart. He is a man whose whole existence has been reduced to a cry for help -- and who has been so damaged by life that he can only express that cry in acts of crude sexuality.

...The girl, Jeanne, is not a friend and is hardly even a companion; it's just that because she happens to wander into his life, he uses her as an object of his grief.

https://film.avclub.com/last-tango-in-paris-1798167521

He holds back nothing, and it’s enthralling, but sometimes hard to watch. So is the movie. Like his protagonist, Bertolucci wants to get down to the core of things, and that descent into the primitive sometimes feels as artificial as high-tea table manners. Schneider and Brando’s characters attempt to abandon their humanity, but their sex scenes feel raw and unreal, emptying out into a revelation of emptiness that itself feels a little empty. Like Sam Peckinpah’s Straw Dogs the year before, it offers a nihilistic vision of what it means to be human, using sex instead of violence to show the beastly impulses beneath our most refined feelings, and the way the beast within always wins.

On another note, there appears to have been fallout from the film:

https://en.wikipedia.org/wiki/Last_Tango_in_Paris

Schneider declared in an interview that "Marlon said he felt raped and manipulated by it and he was 48. And he was Marlon Brando!".[21] Like Schneider, Brando confirmed that the sex was simulated.[16] Bertolucci said about Brando that he was "a monster as an actor and a darling as a human being". Brando refused to speak to Bertolucci for 15 years after the production was completed. Bertolucci said:

According to TV Tropes:

When Marlon Brando was asked what the movie was about during his 1979 Playboy Magazine interview, he responded, "Bernardo Bertolucci's analysis."

Bernardo Bertolucci was the film's director. I take this to mean that even Brando himself didn't know what his acting was supposed to convey.

For the record: Brando hated working on the film, came to deeply regret it in later life, and even told Bertolucci: "I was completely and utterly violated by you. I will never make another film like that." We'll probably never know for certain why he agreed to star in the film in the first place, but considering it earned him about $3 million (nearly double what he earned from The Godfather), it is possible he did it solely for the money.