Skin

Noun:   a natural protective covering of the body; site of the sense of touch
Verb:   bruise, cut, or injure the skin or the surface of

Noun:   the tissue forming the hard outer layer (of e.g. a fruit)

Skin asked!
When I seat or walk anywhere

I feel hot or cold, soft or hard,

and even smooth or rough;

But, why I’m waken

Only by hot or cold

as well as mostly noise

or sometime by someone   

while sleeping?

Why without vibration

There no touch?

Why I have bump, black mark,
or  liquid pore-out   
when some thing or someone 
hit me or I have cut?