I often hear people claim that everything we do is "selfish" or ultimately aimed at our own pleasure (and avoidance of pain). The way the argument usually goes is that we wouldn't do something unless we "wanted" to do it - and that even for altruistic actions, we do them because they feel good. This view is sometimes called "psychological egoism:" the claim that every human action is motivated by self-interest. I think this claim is either seriously mistaken (if interpreted one way) or true but...