The US version is cleaned up (mostly)
It's about the secret "ceremonies" of the decadent rich. In the movie, sex is only depicted (and hidden) between actors. Left to the imagination whether the guests participate, but they all do wear masks and costumes.
Except the organist, who wears a suit.
Kubrick died soon after exposing the sex cult of the rich and presumably famous. Cue conspiracy theories.
To give you some idea of the fantasy world, here's the manual for staff at Jeffrey's Palm Beach residence. (3.7MB PDF)
https://ia601303.us.archive.org/4/items/epstein-docs_20240108/gx-606%20Epstein%20Household%20Manual.pdf

'See Nothing, Hear Nothing, Say Nothing': Inside the 59-Page 'Household Manual'' That Jeffrey Epstein Employees Were Told to Follow
https://lawandcrime.com/live-trials/ghislaine-maxwell/see-nothing-hear-nothing-say-nothing-inside-the-59-page-household-manual-that-jeffrey-epstein-employees-were-told-to-follow/
In the words of Juan Alessi, the man tasked with Epstein property's upkeep between 1990 and 2002, the document was "very degrading."
"Most of the pages, they were just unbelievable to me," groused Alessi, the ex-house manager for Epstein. "They were written for the employees. And it wasI wasn't hire[d] to do that type of work."
During his cross-examination, Alessi compared some of his work to "slavery," saying he was on call 24 hours a day when the top boss, Epstein, was in town. He also described Ghislaine Maxwell, on trial for charges of sex trafficking and alleged violations of the Mann Act, as the "lady of the house" and an exacting taskmaster in her own right.
Over the course of two days, Alessi described cleaning Epstein's sex toys, including a "large dil**" that he found in Epstein's massage room.
"It looked like a huge

Degrading is the word for Epstein and his buddy Donald.