To get a PG-13 rating you can have brief nudity ... Interestingly, at the forefront of most of the public battles with the MPAA ratings board is Harvey Weinstein of The Weinstein Company.

The number of reasons indicated for the MPAA rating significantly increases with the age-based rating category, with an average of 2, 2.4, and 2.7 rating reasons for films rated PG, PG-13 ...

The MPAA rating reasons provide important information about content, but they do not identify all types of content found in films and they may particularly miss the depiction of substances.