There is talk of Joan having started in an "erotic film" earlier in her youth.
There are some sexual references, but nothing more than that. At most some brief kissing scenes. No nudity.
There are some sexual references.
Some f-words are used in their literal meaning. Sex is implied and a homosexual sexual situation is barely shown but heavily implied in an earlier episode. Bette has a one time affair with her married director. Sex is underlining tension throughout.