Twin shafting is a form of mutual masterbation where two males stand facing each other; one of the males places both penises in his hand, and strokes both shafts simultaneously.
Peter and Ryan are downtown; both have drank at least a six pack worth of beer. Peter and Ryan meet in an alley behind the bar and both are coming out of bad relationships. After a night of gossiping to one another, Ryan suggests to Peter they play tummy sticks. Peter says no, instead let's try Twin Shafting.