sorry but the “R” rating doesn’t tell people that the shape of water has an awkward gross sex scene and that a cat gets decapitated so yeah its kinda necessary for that to be pointed out.
fyi yall, you can always look up the common sense media rating for any popular movie or show to find out exactly what potentially sensitive/upsetting scenes it includes. case in point: https://www.commonsensemedia.org/movie-reviews/the-shape-of-water
it’s meant for parents but why not take advantage of a good resource
IMBD’s parental guide is good too http://imdb.com/title/tt5580390/parentalguide this has everything listed in the post, so if you are seeing a rated R film I recommend looking there