I'd flip a coin; all or nothing. A human can often learn from pain in some way, but it seems just as likely people will say "Ow. That hurt. LOL." and move on without a second thought. "What caused the pain?" "What is it to feel hurt?" "Was it really so bad?" Sometimes overshadowed by "OW FUCK MAKE IT STOP."
So, 50-50 chance I take as much as I can until I pass out (hopefully, enough to relieve the sufferer, can we keep the pain even if unconcious?) or leave the unlucky bastard to writhe and maybe have some revelation by the end of it.
So, 50-50 chance I take as much as I can until I pass out (hopefully, enough to relieve the sufferer, can we keep the pain even if unconcious?) or leave the unlucky bastard to writhe and maybe have some revelation by the end of it.