Sigmund Freud's psychoanalysis theory claims the anal stage follows the oral stage of infant/early-childhood development. This is a time when an infant's attention moves from oral stimulation to anal stimulation (usually the bowels but occasionally the bladder), usually synchronous with learning to control their excretory functions, a time of toilet training. For a child in this stage of development, control of bowel movements is the stage at which the child can express autonomy by withholding, refusing to comply, or soiling himself or herself. Conflicts with bullying parents regarding toilet training can produce a fixation in this stage, which can manifest itself in adulthood by a continuation of erotic pleasure in defecation.
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