A G-rated movie is aproved for all adiences, so it doesn’t contain anything in theme, language, nudity, sex, violence or other matters that the Rating Board think would offend parents that are taking their young children with them.
A PG-rated movie is viewed by the Rating Board, that parents should decide if they want to show their children. These rated movies may show profanity and some depictions of violence or brief nudity, but these elements are not deemed so intense as to require that parents be strongly cautioned beyond the suggestion of parental guidance. There is no drug use content in a PG-rated motion picture.
PG-13- rated movie is a sterner warning by the Rating Board that tells parents to strongly caution before taking their kids th a movie rated PG-13. Any drug use will initially require at least a PG-13 rating. More than brief nudity will require at least a PG-13 rating, but such nudity in a PG-13 rated motion picture generally will not be sexually oriented. There may be depictions of violence in a PG-13 movie, but generally not both realistic and extreme or persistent violence. A motion picture’s single use of one of the harsher sexually-derived words, though only as an expletive, initially requires at least a PG-13 rating. More than one such expletive requires an R rating, as must even one of those words used in a sexual context.
An R-rated motion picture, in the view of the Rating Board, contains some adult material. An R-rated motion picture may include adult themes, adult activity, hard language, intense or persistent violence, sexually-oriented nudity, drug abuse or other elements, so that parents are counseled to take this rating very seriously. Children under 17 are not allowed to attend R-rated motion pictures unaccompanied by a parent or adult guardian. Parents are strongly urged to find out more about R-rated motion pictures in determining their suitability for their children. Generally, it is not appropriate for parents to bring their young children with them to R-rated motion pictures.
An NC-17 rated motion picture is one that, in the view of the Rating Board, most parents would consider patently too adult for their children 17 and under. No children will be admitted. NC-17 does not mean “obscene” or “pornographic” in the common or legal meaning of those words, and should not be construed as a negative judgment in any sense. The rating simply signals that the content is appropriate only for an adult audience. An NC-17 rating can be based on violence, sex, aberrational behavior, drug abuse or any other element that most parents would consider too strong and therefore off-limits for viewing by their children
In my opinion parents should be able to let their kids see any movie, according to their own opinion, but movie ratings are important to give the parents a heads up on what will happen in the movie. I also think that they should maybe change some things about the G and PG ratings because some parents think that PG is inappropriate even though it is totally not, so maybe they should shove both of those ratings together and make a new ratings.
For more information on thi topic head on over to: http://www.mpaa.org/ratings/ratings-history