in paranoic states the libido has stopped in its regressive movement at the stage of partial incorporation (the third stage)… the kleptomaniac has taken as his sexual aim an oral incorporation of his object, while the paranoiac has made his its anal incorporation.
Abraham argues that fixation at distinct stages of incorporation—oral versus anal—determines the structural difference between kleptomania and paranoia, making incorporation the axis of psychosexual pathology.
, Selected Papers on Psychoanalysis, 1927thesis