The Dissolve put together this neat animation that briefly looks at the history of the PG-13 rating, a rating that was invented after Indiana Jones and the Temple of Doom and Gremlins was released. And in discussion of the rating, it reveals how backwards the MPAA can be when it comes to violence vs sex, love and nudity.
But the worst thing about the PG-13 rating is how those movies can make so much damn money causing studios to neuter their movies in order to not cross the R threshold.