My point wasn't to claim that everyone experiences empathy in the same way, or even that everyone has it, but to point out that pain can't be reduced to "calculations". It's a low resolution substitute for a deeply complex interplay of physical, biological and social phenomenon.
That is an assumption, and a dangerous one at that. What you speak of is a kind of 'empathy', a feeling of emotions by Proxy... not everyone actually has that... some people don't cringe at other's pain, for some: their pupils dilate.
That's a tangent to the current discussion, but yeah... some 'calculate your pain', other's 'calculate the pleasure your pain cause in them'...
But to add to the discussion, pain isn't localizable to one person, not always, at least... so is emotion/feeling mappable a calculation of the neurons? (maybe/probably)