Psychopathology of bounding is a central feature in Border Line Adolescents. This feature is underlying both their violent acting and their reluctance to engage in a therapeutic relation. In a milieu treatment, cultural mediations appear as one of the best way to overcome this difficulty because they put the focus on pleasurable activities rather than on the relation itself. It allows the therapeutic staff to find a way out of the paradox where relation which is the main therapeutic solution is at the same time the main psychopathological problem.