Waterholic going further with your comment, are you speculating that pleasure and pain can indeed be reduced to fungible units?
I sometimes got that impression from DeWitt's "unity of pleasure" chapter but not sure he stated that explicitly.
Cassius i don't believe it can, at least not with our limited understanding of our biology. I rather use it as a "model" to think about how pleasure and pain have emerged as chemical instruments of evolution to guide ALL living organism (including animals).