I simply love positional punishments. I properly position the sub, immobilize him, and then just enjoy how his own body does all the work for me. I can watch with amusement as he tries to break free from his bonds, how he positions himself hoping I'll finally strike and at least slightly relieve his suffering. Seeing a writhing man in front of me is simply grotesque and hilarious.
My applause for the performer.
He'll have to add a few more encores :-)