A stunt dick is more popularly referred to as a stunt cock. It is a substitute cock in porn movies, replacing the main actor's cock in close-up sex scenes. The main role of the stunt dick is to step in when the star's dick is incapable of erection or ejaculation. Like a traditional movie's stunt man, a stunt dick is the anonymous cock that saves the day, and allows for cost-effective porn film production.