The touch

More than talking about an organ, system, substance, I will focus on talking about the touch, because I think that feelings things, person, stimuli is one of the best sensations that exists. For me, it is pleasant to have the possibility of feeling and perceiving. The touch is responsible for the perception of stimuli such as contact and pressure even of pain. It allows us to perceive qualities of objects and perceive our environment in general.
The sensory organ of the touch is the skin, the largest organ of the human body. The perception of these external stimuli is done through the specific receptor cells that each of these skin signals has. 
Some of diseases can affect the touch are : CIPA, analgesia, allodynia. 
-The congenital insensitivity to pain with anhidrosis (CIPA) is a genetic disease characterized by the inability to feel pain and perceive the temperature and the lack or decrease of sweating. It is produced by mutations in the NTRK1 gene.
-In the analgesia there is a total absence of discomfort or pain.
-And in the allodynia there is an exaggerated perception of pain before stimuli that in normal situations and for the common of people are not painful. 
Currently there is no cure for this diseases, only dealing with drugs and hope that the inheritance does not affect your health. 
Definitely a life without being able to perceive sensations, without feeling, without touching; I would not like to live it !