From No Subject

[edit] Freudian Dictionary

IMPOTENCE, PSYCHIC

The sexual function is subject to a great multiplicity of disturbances, the majority of which have the character of simple inhibitions. These are grouped together as psychic impotence.^[1]

Here again-as very probably in all neurotic disorders-the root of the trouble lies in an arrest occurring during the course of development of the libido to that ultimate form which may be called normal.^[2]