The description of why Fifty Shades Darker received an R-rating, as reported by ComingSoon, is as fun as we would expect, “strong erotic sexual content, some graphic nudity, and language.”
If anything, this is something of a step back from the description of Fifty Shades of Grey.
Of course, the real fun part when looking at ratings these days is looking at the description that accompanies the letter.
The rating description for that one included the phrase “some unusual behavior” which in the case of the bondage focused franchise would be saying something.