A masturbation technique used only by the savviest of males. Simply place your weak hand on a chair and sit on it for 5 minutes (righties use left, lefties use right)then proceed with your business. To complete the Reverse Stranger flip your hand palm side down with your thumb and pointer facing your body.
*Hint - Have your girl try it on you for a "Perfect Stranger"
"Damn, what a long day at the office. I think I'll treat myself to a reverse stranger strangerbefore I go to bed."