The Intruder
Variation on The Stranger, a masturbation technique wherein one employs a numbed hand, giving the sensation of another person. With The Intruder, however, one stands in front of a mirror wearing a ski mask, giving the impression that someone has broken into one's home and started jacking one off with a stone cold gaze.
Help, it's The Intruder. How did you get in here? Stop doing that.