I took my daughter to several PG movies when she was a child. Also to several PG-13 movies which, after careful consideration, I decided she was mature enough to comprehend without too much confusion or adverse reaction to the contents of the movie.
I also took her to a few R rated movies which, once she was 13 and older, and after much consideration, I deemed the same as above.
I never took her to an NC-17 movie. This is because I felt any movie rated stronger than an R rating could wait until she was certainly an adult who had already sorted through many of the emotional and ethical issues displayed in less volatile presentations.
This is what a parent does, if one truly understands the responsibility of guiding a young mind and heart, rather than plopping them in front of a TV, tossing books at them to avoid interactive discussion or giving them movie money without any further involvement.
This said, I would like to point out that I LOVED this movie, and would only have taken my daughter to it at around the age of 15.
This is due to the use of the F word multiple times and, yes, the bare breast which still showed nipple even though from the side view, and, in a young one's mind, those few seconds are a lifetime of exposure, trust me, I was young once, and I remember it well.
And, yes, she was allowed to go to movies with her friends as well as family time with me.
It is funny, but very true, that young minds are able to handle ethical issues much more maturely than nudity. I do not take nudity lightly because I love nudity and it is an important part of sexuality which should not be thrown at us until it no longer provides the same erotic responses it once did, but new responses of a gruffer kind.
What I don't understand is why there is an issue about a strong rating. If you are an adult, it should not stop you from seeing the movie! If you are a child, your parents should be happy that theaters will not allow you in to see it without adult supervision. If you are a parent who would rather your child be able to see R movies without an adult, which is the only reason I can think of why someone would be inconvenienced by the R rating, then shame on you for failing to be an active part of your child's growing years.
Backseat Producers can't simply enjoy movies. They nitpick & complain about every imperfection.