One is that an ethical egoist would not want ethical egoism to be universalized: as it would be in the egoist's best self-interest if others acted altruistically towards him, he wouldn't want them to act egoistically; however, that is what he considers to be morally binding. His moral principles would demand of others not to follow them, which can be considered self-defeating and leads to the question: "How can ethical egoism be considered morally binding if its advocates do not want it to be universally applied?"