I was curious... are there any people out there who have deliberately destroyed their dorsal nerves?

Well, I cut through them, which destroyed them.

If its the one that gives sensation in the little chap.

I damaged mine for a bit (after experimenting with clamping) and it was nice but anoying as well.

My dick was numb for about 3 weeks.

I could get a boner have strong sexual desires but could do nothing with it.

My little man had no sensation in it whatsoever i gould flick the tip and feel nothing.

My balls started to ache after a while.

I was very relieved when feeling started to return and after a very long J.O I rid myself of the tension building within.

Moral of this story the balls would have to go as well.