The libido retires from before such a necessary task, for the very human reason of indolence, which is highly developed, not only in children, but also in primitive people. Primitive laziness and indolence are the first resistances to the efforts towards adaptation. The libido which is not used for this purpose becomes stagnant and will make the inevitable regression to former objects or modes of employment. It is thus that the incest-complex is revived in such a striking way. The libido avoids the object which is so difficult to attain and demands such great efforts, and turns towards the easier ones, and finally to the easiest of all, namely, the infantile phantasies, which thus become real incest-phantasies. The fact that, wherever there is present a disturbance of psychological adaptation, one finds an exaggerated development of incest-phantasies, must be conceived, as I have pointed out, as a regressive phenomenon. That is to say, the incest-phantasy is of secondary and not of causal significance, while the primary cause is the resistance of human nature against any kind of exertion. The drawing back from certain duties is not to be explained by saying that man prefers the incestuous condition, but he has to fall back into it, because he shuns exertion; otherwise it would have to be said that the aversion from conscious effort must be taken as identical with the preference for incestuous relations. This would be obvious nonsense, for not only primitive man, but animals too, have a pronounced dislike for all intentional efforts, and pay homage to absolute laziness, until circumstances force them into action. We cannot pretend, either in very primitive people or in animals, that their preference for incestuous relations causes aversion towards efforts of adaptation, as in those cases there can be no question of “incestuous” relations. This would presuppose a differentiation of parents and non-parents. Characteristically, the child expressed her joy at being allowed to love her teacher, but not at being allowed to do her utmost for him. That she might love her teacher is what she understood at once, because it suited her best. Her relief was caused by the information that she was right in loving him, even though she did not especially exert herself before.