It sounds to me like he enjoys it when the degree and duration is completely within his control. When others inflict, it's out of his control and that stuff is usually associated with submission and humiliation.
Oren
How strange. I looked at this thread title twice and each time I thought it said, "Palin" and not "Pain". I thought perhaps it was misplaced in the studio lounge section instead of the political mumbo jumbo section.