Short film: Blow Job by Andy Warhol. Mostly SFW...it's just the face of the recipient. Here's some info on the film.
When Andy Warhol decided to shoot Blow Job, he rang Charles Rydell and asked him to star in it, telling him that "all he'd have to do was lie back and then about five different boys would come in and keep on blowing him until he came," but that the film would only show his face.
Charles agreed, but when he didn't show up for the following Sunday afternoon shoot, Andy reached him at Jerome Hill's suite at the Algonquin and screamed into the phone "Charles! Where are you?" Charles responded: "What do you mean, where am I? You know where I am - you called me," and Andy the said "We've got the camera ready and the five boys are all here, everything's set up!" Charles's shocked reply was: "Are you crazy? I thought you were kidding. I'd never do that!"