Photographer Barbara Nitke, on the tricks of performing oral sex for the camera in the 1980s:

I photographed Little Oral Annie for days going down on all of the biggest guys in the business. She made it look effortless, but I noticed that she always a put large gob of Vaseline in her mouth just before they started shooting. I finally got up the courage to ask her about it, and was so nervous that I ran out of the room when she offered to give me a lesson.