But it must be remembered that what we see in
erotic fetichism is merely the exaggeration of a normal impulse; every
lover is to some extent excited by his mistress's hair, or foot, or
clothing. Even here, therefore, there is really what may fairly be
regarded as a congenital element; and, moreover, there is reason to
believe that the erotic fetichist usually displays the further congenital
element of hereditary neurosis. Therefore, the analogy with erotic
fetichism does not bring much help to those who argue that inversion is
purely acquired. It must also be pointed out that the argument for
acquired or suggested inversion logically involves the assertion that
normal sexuality is also acquired or suggested. If a man becomes attracted
to his own sex simply because the fact or the image of such attraction is
brought before him, then we are bound to believe that a man becomes
attracted to the opposite sex only because the fact or the image of such
attraction is brought before him. Such a theory is unworkable. In nearly
every country of the world men associate with men, and women with women;
if association and suggestion were the only influential causes, then
inversion, instead of being the exception, ought to be the rule throughout
the human species, if not, indeed, throughout the whole zooelogical series.
We should, moreover, have to admit that the most fundamental human
instinct is so constituted as to be equally well adapted for sterility as
for that propagation of the race which, as a matter of fact, we find
dominant throughout the whole of life. We must, therefore, put aside
entirely the notion that the direction of the sexual impulse is merely a
suggested phenomenon; such a notion is entirely opposed to observation and
experience, and will with difficulty fit into a rational biological
scheme.

The Freudians--alike of the orthodox and the heterodox schools--have
sometimes contributed, unintentionally or not, to revive the now
antiquated conception of homosexuality as an acquired phenomenon, and that
by insisting that its mechanism is a purely psychic though unconscious
process which may be readjusted to the normal order by psychoanalytic
methods. Freud first put forth a comprehensive statement of his view of
homosexuality in the original and pregnant little book, _Drei Abhandlungen
zur Sexualtheorie_ (1905), and has elsewhere frequently touched on the
subject, as have many other psychoanalysts, including Alfred Adler