I am guessing it was to just make a small knick in the nipple and then bandage it so as it heals it rubs against the bandages and clothing to make him more hyper-aware and sensitive.
Ditto, I feel like it’s that fine line between pleasure and pain, they clipped a lil piece so that he can get conditioned to eventually feel pleasure from just his nipples. Which I think he was already sensitive to begin with so, then clipped them just put him in overdrive.
What was with the finger nail clipper and his nipple thing?? I need to know because I can't figure it out! ヽ(`Д´)ノ