Integrating factors can be remarked in herd animals. Dogs love to play, wolves howl and one can estimate the strength of the link uniting them by the number of voices they produce. Canadian biologist Louis Chrysler howled with the wolves and earned their love and recognition. Discipline and hierarchy characterize all animal communities. People are ready to pay a price for each pleasure in the above list.
People pay for eating in restaurants, they pay for watching theater, movies and sport competitions.
People seek these pleasures and are ready to pay for them. One can approach the above list from a different viewpoint. Instead of Freud s pleasure principle, we can speak about factors whose absence causes displeasure or irritation. Let us turn to the alcoholic and assume that his requirement of alcohol is one glass of vodka per day. If he does not receive this daily portion he becomes irritable.