Smiling Often Driven by Feeling of Engagement, Social or Not

It is widely assumed that we smile because we are happy, and/or that it is a natural response to interacting with other living beings.

While these are often the case, U.K. researchers at Brighton and Sussex Medical School (BSMS) found that smiling may stem from another source. They discovered that smiling is often triggered by a feeling of engagement — even if it’s engagement with a non-living object.

Dr. Harry Witchel, discipline leader in physiology at BSMS and a body language...

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