"One, one", a diptych, on the theme of the touch, the tact and the con-tact, more particularly in relation with the skin. It is the skin that separates the me from the non-me and is therefore considered as the sense of socialization. During the first part of the diptych, two men are locked up in a large spherical membrane, soft and transparent, stomach, placenta or cocoon: the skin. Inside of the psycho-physiological volume, two dancers face each other, body against body, and tie up an intense relationship offering no way out neither landmark, the sphere the limit towards the outside that rolls over the stage in an unceasing movement, like a strange remake of the myth of Sisyphe. During the second part, in a light and shade setting that slowly turns to colour, the skin is no more the limit towards the outside, but what we touch. The five couples on stage charm, explode, reveal themselves through touching, by means of the language of the tango. Face to face, body against body, the tango is gradually contaminated by other languages that pile up in a crescendo during the whole piece and bring to light the structure of the choreography.