This does not necessarily follow. The neurotransmitter chemicals can remain the same but whole areas of the brain can be rewired such that the area processing the pain can be connected differently to the rest of the brain, including an area which experiences pleasure.
This does not necessarily follow. The neurotransmitter chemicals can remain the same but whole areas of the brain can be rewired such that the area processing the pain can be connected differently to the rest of the brain, including an area which experiences pleasure.
(This is not an endorsement of the grandparent.)