Cliff Claven Trivia Moment: The movie rating PG-13 was brought into being single-handedly by the Steve Martin/Carl Reiner movie The Man with Two Brains. Steve Martin has a brain he's in love with, but no body to put her into. When the scientist helping him says he could put her brain into a gorilla body, Steve responds, "I can't fuck a gorilla!" The folks involved in the movie felt it was silly to get an R rating for this one joke, but didn't want to lose it. Thus PG-13 was created, and to this day, you can use the work "fuck" precisely once and get a PG-13 rating. More than one "fuck" and you have an R.