All of us have a skin. It's the interface between the outside world and us. It's the spatial marker of things that are mostly me, even if some of those things are on the way out (breath and excrement), and things that are mostly not me, even if some of those are on the way in (breath and food).
Sensation also begins with the skin. Every sensory receptor we have is part of the skin. Some of these receptors are mechanical, others are photosensitive, but there's nothing that comes into our minds that isn't mediated by the skin.
Normally, we think of the brain as the mediator, the place where sensation is transformed into perception and cognition. That may be, though there are reasons to disbelieve such a simple story.
The point I am trying to make is that whatever the brain does, whether that's information processing or just registration, is in the service of the skin. It's the skin's view of the world that's important to us.