By far the easiest way for the woman to satisfy her craving for power is the development of an interesting illness which makes her the centre of attention. The history of nervous disease furnishes many cases of neurosis where this uncontrollable longing for domination is the chief factor in the etiology of the illness. It is not at all unusual to meet wives who hold their husbands subservient to every whim because of "delicate nervous organizations" which are upset at the slightest thwarting of their wishes so that they develop nervous headaches, nervous indigestion, and many other kinds of sickness unless their preferences meet with the utmost consideration. This tendency often becomes a chronic invalidism, which, at the same time that it brings the longed-for attention, incapacitates the individual for sexual and maternal activities and makes the married life an abnormal and unhappy one. Another more or less neurotic trait which acts as a cause of disharmony in the marital relationship is the sexual anæsthesia which is not at all uncommon in modern women. The absence of any erotic passion is held to be a matter of physiological makeup by many authorities, but it is probably more often due to the inhibition of natural tendencies in accordance with concepts built up by social tradition. In order to understand how social suggestion can have so powerful an effect upon the reactions of the individual, we must revert once more to the principles of behaviouristic psychology. According to Watson,[4] whenever the environmental factors are such that a direct expression of an emotion cannot occur, the individual has to have recourse to implicit motor attitudes. The best example in everyday life is probably seen in the case of anger, which can seldom be permitted to find an outlet in the natural act of striking, etc. It is apparent, however, in the facial expression and in a certain muscular posture which can best be described as a "defiant" attitude. Another good example is the submissive attitude which often accompanies the emotion of fear. It is manifest in shrinking, avoiding movements, sometimes of the whole body, but more often of the eyes or some other special organ. "In the sphere of love," Watson remarks, "there are numerous attitudes as shown by the popular expressions lovelorn, lovesick, tenderness, sympathy. More fundamental and prominent attitudes are those of shyness, shame, embarrassment, jealousy, envy, hate, pride, suspicion, resentment, anguish, and anxiety."[4]