The Purity Myth Poster The Purity Myth Amazon » eBay » The film "The Purity Myth" is a 45 minute documentary from 2011.. The Purity Myth Details Title: The Purity MythYear: 2011Genres: DocumentaryDuration: 45m Rate this title Have you seen The Purity Myth? Rate it between 1 to 10 below. Log in to your account if you want to rate this title.