If you like a bit of genuinely painful torture, then this may be for you:
Years ago we saw a film called Maitresse. You had to be a member of a cinema club to see it, and I went to The Screen on the Hill.
One scene involved torture with nails etc on a male body. We know penis torture is popular:
Mind, things can go terribly wrong: http://www.heavy-r.com/video/108020/High_Heel_Cock_Torture_Gone_Horribly_Wrong/