Having that extra insight gives us a more honest appraisal of others and it will in the end assist us in communicating more effectively and empathetically for a deeper understanding.
It doesn't have to think, it just reacts to the world in real time and our bodies show how we feel.
Someone gives us bad news and our lips compress; the bus leaves without us and we are clenching our jaws and rubbing our necks.
For millions of years, our early ancestors ambled on this planet, navigating a very dangerous world.
They did so by communicating effectively their needs, emotions, fears, and desires with each other.
Once again, our limbic brain communicates through our bodies precisely the true sentiments that we feel and orchestrates accurate corresponding nonverbal displays.
In a way, our bodies don't really have to do these behaviors and yet we evolved to demonstrate them for a reason: we are social animals that need to communicate both verbally and nonverbally. Children who are born blind, having never seen these behaviors will also perform them.
The benefit is two fold, we react to the world around us and others benefit from our early reactions even as we do from theirs.
For example, taste something putrid and everyone around you will know from your expression; they don't need to taste it also.
Research has clearly shown most Americans become automatically hyper-vigilant and fearful on an unconscious level in the presence of African-American males.
This is highly unfortunate and results in much discrimination.
This system that evolved over time, which alerts us instantly of any perceived danger, also instantly communicates to others around us.