X-rated movies are films that contain explicit sexual content and are intended for adult audiences only. These films often feature graphic depictions of sexual acts, nudity, and themes that may not be suitable for younger viewers. The X-rating indicates that the content is not appropriate for children and typically requires viewers to be at least 18 years old. The X-rating was originally established by the Motion Picture Association of America (MPAA) in the late 1960s. Over time, the rating system has evolved, and the X-rating is now less commonly used, with many films instead receiving an NC-17 rating, which also signifies adult content but is more widely recognized in the industry.