A Common Form of Psychological Egoism Says That People Perform

A common form of psychological egoism says that people perform actions-even actions that appear to be altruistic or selfless-solely to obtain satisfaction, happiness, or pleasure. But Feinberg argues that this view of the matter is muddled. It is much more likely that we act to obtain particular things, not satisfaction itself, and that we experience satisfaction as a byproduct of obtaining those things. We don't seek satisfaction; we seek certain things that give us satisfaction when we acquire them. If the things themselves were not the object of our desires, it would be difficult to see how we could get any satisfaction from our attaining them.
-Bentham insists that pleasures should be measured by their quantity, not quality.