Certain other childish habits, such as nail-biting, have also been described as sexual manifestations. What I have said of sucking movements applies to this also. It is true that nail-biting and masturbation may both occur in the same child, and French writers have maintained that there is a causal nexus between the two processes. If we regard nail-biting as a "tic" occurring chiefly in neuropaths, and if we assume that the neuropathic congenital predisposition is the basis of the premature awakening of sexuality, it may be supposed that to that extent there exists a relationship between the two phenomena, inasmuch as we may refer both manifestations to a common cause, viz., the neuropathic predisposition. But there is no justification whatever for regarding, as some do, one manifestation as the direct consequence of the other. Speaking generally, we shall do wisely to exercise caution in defining the limits of the sexual life of the child. If a boy runs after a girl, and if the two flirt one with the other, it will often be merely from a desire to imitate their elders. In many instances, even, in which the genital organs play a part in such imitation, we must distinguish what is done from the sexual life proper of the child. If children play at "father and mother," if the "midwife" comes, and "childbirth" takes place, the play may certainly depend upon an early awakening of the sexual life; but this is not necessarily the case. There may be no more than innocent imitation of grownups, as the following case shows. A number of little boys and girls, almost all under eight years of age, played at being prostitutes, souteneurs, and men-about-town. The little girls each demanded a penny when they had allowed the little boys to touch their genital organs. It was an extremely characteristic fact that the leader of this band was a feeble-minded boy, whose parents I had advised to send him to an asylum, because, after various dangerous actions, he had attempted one night to kill his little sister eighteen months old by inserting beans in her nose. Such acts as that first described may, of course, depend upon a premature awakening of the sexual impulse; and when a number of children engage in amusements of this kind we not infrequently find that in the leader and seducer the sexual impulse is already awakened, whilst the others act merely in obedience, at first, at least, to an imitative impulse. Certainly, I have known a few instances in which children with premature sexual development very rapidly came to a mutual understanding, and in whom their intimate association was dependent upon prematurely awakened sexual impulses.