Hmm....
I once saw the movie Whipped where Amanda Peet plays a girl playing 3 guys who are all friends. Really shitty movie. However, there is one part that sticks out. The biggest loser of the group is doing a narrative staring into the camera on the toilet while sitting on his left hand. He said that he basically waited til he lost circulation in his hand to make it feel all pins and needly and then masturbated, because it felt like a different person.
Maybe that can help Poli- Um, your friend.
Dames