Peter Blos has argued for the idea of a second process of separation-individuation in adolescence, conceived as an obligatory revival of psychical differentiation put in to difficulty by the upheavals of puberty. However, the fruitfulness of this theory deserves to be investigated in light of the requirements of Freudian metapsychology. It is also important to take into account the role reserved for the object itself, object whose responses are not without consequence for the development of the undefined process of subjective appropriation. Can we finally verify the value of this hypothesis in the comprehension of certain psychopathological manifestations in adolescence which require specific rearrangements in the therapeutic relationship ?