Do discs have the ability to feel pain?  Should discs be able to feel pain?

Nerve supply of the lumbar intervertebral disc published by M.A. Edgar in the Journal of Bone and Joint surgery 2007.  

Nerves are more abundant than blood vessels in the degenerate human intervertebral disc published by Abbie L. A. Binch et al in the Arthritis Research and therapy journal in 2015.