Applicable to all categories...the version that I saw was not 180 minutes long, so there may be other content that could be included in these advisories that I did not see.
A woman boasts of having been seen swimming naked by a man but in the scene, which we saw, she was reasonably well covered by modern standards in a petticoat. Later the man is washing with only a towel wrapped around his waist which a woman deliberately and seductively dislodges so that it falls off in front of her and a sex scene ensues with brief clips of the couple at different stages of their lovemaking including removing a stocking, passionate embraces and more but I don't think there was either frontal female nudity or nudity below the waist...think I'm right about this but can't be 100% sure.