David le Breton : The Forest Fire : An Anthropology of Self-Mutilation

In adolescence the body becomes a projection surface that one must control by adorning it, concealing it, abusing it, etc. Existence is a matter of skin, a question of the frontier between inside and outside. Cutting into the body brings suffering to the surface of oneself, where it becomes visible and controllable; it is much more an act of passage than a passage to the act