“At no other point in one's analytical work does one suffer more from an oppressive feeling that all one's repeated efforts have been in vain (…) that when one is trying to persuade a woman to abandon her wish for a penis on the ground of its being unrealizable or when one is seeking to convince a man that a passive attitude to men does not always signify castration (…) We often have the impression that with the wish for a penis and the masculine protest we have penetrated through all the psychological strata and have reached bedrock, and that thus our activities are at an end. This is probably true, since, for the psychical field, the biological field does in fact play the part of the underlying bedrock” (Freud, 1937).