Massimiliano Sommantico, Ph.D., Associate Professor of Dynamic Psychology, Dynamic Psychology Laboratory, Department of Humanities, University of Naples Federico II, Italy. Clinical Psychologist, Full Member of the Italian Psychoanalytic Society, of the International Psychoanalytical Association, and of the International Association of Couple and Family Psychoanalysis, Member of the Séminaire Inter-Universitaire Européen d’Enseignement et de Recherche en Psychopathologie et Psychanalyse. His main areas of research are couple and family relationships and clinical psychoanalysis, with particular attention to sibling relationships.