The Motion Picture Association of America (MPAA) rating system provides content warnings to help parents determine if a film is appropriate for young ones. However, historical changes in the rating system as well as shifts in cultural attitudes have left various classic films with a surprisingly low PG rating. From 1934 to 1968, films were regulated by the Hays Code, which effectively banned any objectionable content across all motion pictures. Filmmakers spent years cleverly subverting the restrictive code before it was replaced by the MPAA rating system in 1968. This newfangled rating system allowed filmmakers to indulge in mature themes....