John - Welcome to the torment group...do you still have those punishment clamps tha grab the tit AND pierce it with a 'can opener' (Fire Island 198?)
The Kama Sutra describes male nipple arousal as the ultimate in sexual maturity. We are here to celebrate the experience. The nipples when stimulated, cause release of oxytocin, a hormone that is associated with sexual pleasure and shot out into the bloodstream. Needless to say that extraordinary sensitivity nipples have a stimulating or enhancing / touch and painful torture.