In a previous paper dealing with Schreber's hallucinations, the author developed the theory that a hallucination is based upon the anticipation of a danger. When psychosis occurs, there exists, alongside of the psychotic part of the personality, another part which tries to maintain contact with reality. Whenever the nonpsychotic ego anticipates a situation in which homosexual feelings might gain the upper hand and lead to orgasm—which would mean the breaking off of contact with reality—the ego interferes. The cathexis of the dangerous homosexual urge is withdrawn, and its energy is used in forming the hallucination. As