Through the sense of touch, the body enters into a relationship with the world. Learning to touch is therefore equivalent to learning to be in the world. By bringing the body and the contact between humans, animals and things back to the center of philosophical speculation, the author intends to set up a practical philosophy, reviving a phenomenology of feeling, of being passionate, of which touch is the first tool. The sense of touch plays a rather marginal role in philosophy. Analyzed in a scientific context, it has often been the object of reflection for anthropologists and psychologists, much less for philosophers who - more generally - have reserved little speculative consideration for the body. The body, on the other hand, is the formidable recognition device through which we come into contact with the world; knowing and living begin from it. Learning to touch means learning to be in the world. Divided into five parts (like the five fingers), this book addresses the issue of touching in various ways: a placement of the sense of touch in the history of philosophy with an investigation of an aesthetic nature; a phenomenology of touch starting from the skin, (passive touch), hand (active touch), gesture (visual touch); observations on socio-technological contact; an anthropology of touching and finally a metaphysics of touch as a manifestation of being in motion that has inevitable ethical implications.