PG-13 is one of those areas where parents are warned to monitor what children watch or read. According to Hollywood movie experts, the official definition is:
PG-13 rated movies stand for Parental Guidance-13, with parents strongly cautioned, as some material may not be suitable for children under 13. Again, it’s a matter of what isn’t in the film; any nudity has to be non-sexual, any swear words have to be used sparingly, and, in the event of the specific obscenity we politely call the F-word, not used in a sexual context. (You can say “Oh, (BLANK) this!” in a PG-13 film, but not more than once, and never “I’d love to (BLANK) Denise …”) Violence in PG-13 films may be intense, but must also be bloodless – see Jurassic World or any Marvel Movie, for example – and it is, as per usual, the Ratings Board’s call if the film is deemed to be more than PG but less than R.
At times, it’s hard to remember that you CAN include nudity or certain unsavory words and they are appropriate if used without sex involved. However, I think of all ratings this one is the most difficult for parents (and some children) to determine. If there’s ever a serious question about a movie or book being appropriate for a child, first consider the child’s maturity. If you as a parent don’t think the kid can handle the subject, then by all means, don’t allow the child to see the movie or read the book.