selection together with the sexual method of reproduction. The impulse of
contrectation is secondary, and Moll even regards it as a secondary sexual
character.

While, therefore, this analysis seems to include all the phenomena and to
be worthy of very careful study as a serious and elaborate attempt to
present an adequate psychological definition of the sexual impulse, it
scarcely seems to me that we can accept it in precisely the form in which
Moll presents it. I believe, however, that by analyzing the process a
little more minutely we shall find that these two constituents of the
sexual impulse are really much more intimately associated than at the
first glance appears, and that we need by no means go back to the time
when the sexual method of reproduction arose to explain the significance
of the phenomena which Moll includes under the term contrectation.

To discover the true significance of the phenomena in men it is necessary
to observe carefully the phenomena of love-making not only among men, but
among animals, in which the impulse of contrectation plays a very large
part, and involves an enormous expenditure of energy. Darwin was the first
to present a comprehensive view of, at all events a certain group of, the
phenomena of contrectation in animals; on his interpretation of those
phenomena he founded his famous theory of sexual selection. We are not
primarily concerned with that theory; but the facts on which Darwin based
his theory lie at the very roots of our subject, and we are bound to
consider their psychological significance. In the first place, since these
phenomena are specially associated with Darwin's name, it may not be out
of place to ask what Darwin himself considered to be their psychological
significance. It is a somewhat important question, even for those who are
mainly concerned with the validity of the theory which Darwin established
on those facts, but so far as I know it has not hitherto been asked. I