The consequence of this is that the boy takes on the male gender role, and adopts an ego ideal and values that become the superego. Frustration occurs when these needs are not met; Overindulgence stems from such an ample meeting of these needs that the child is reluctant to progress beyond the stage. Freud also believed that all tension was due to the build-up of libido sexual energy and that all pleasure came from its discharge. First one of the members would present a paper. Electra , by Sophocles. The treatment of one particular patient of Breuer's proved to be transformative for Freud's clinical practice. At first, though aware of Fliess's culpability — Freud fled from the remedial surgery in horror — he could only bring himself to delicately intimate in his correspondence to Fliess the nature of his disastrous role and in subsequent letters maintained a tactful silence on the matter or else returned to the face-saving topic of Eckstein's hysteria. Scientific[ edit ] A usual criticism of the scientific experimental validity of the Freudian psychology theory of human psychosexual development is that Sigmund Freud — was personally fixated upon human sexuality ; therefore, he favored defining human development with a normative theory of psychologic and sexual development. If the parents respond to that, the child must comply, but might develop a weak sense of self , because it was the parents' will, and not the child's ego, which controlled the toilet training. A child at a given stage of development has certain needs and demands, such as the need of the infant to nurse. Conversely, a child may opt to retain feces, thereby spiting his parents while enjoying the pleasurable pressure of the built-up feces on his intestine. The stage culminates in the primary conflict of weaning, which both deprives the child of the sensory pleasures of nursing and of the psychological pleasure of being cared for, mothered, and held. The ideal resolution of the id—ego conflict is in the child's adjusting to moderate parental demands that teach the value and importance of physical cleanliness and environmental order, thus producing a self-controlled adult. As a child passes through these stages unresolved conflicts between physical drives and social expectation may arise.