The top of smiling facts is that Women smile more than men. Men use humor much more and amusement when it comes to discussing sensitive healthiness and well-being issues.
In women, laughter would be more associated with greater social support in relationships and as a means to cope with stress, anxiety and nervous tension. https://www.ncbi.nlm.nih.gov/pubmed/21489520
2- Smiling & real sense of happiness
Smiling releases endorphins that make us feel better.
3. We are all born with the ability to smile, it’s not something we learn from others.
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4- Smiling & immunity
A smile is a universal expression of happiness. It has health benefits including for patients with cancer. Various types of humorous material lessened anxiety and discomfort, which allowed for patients’ concerns and fears to be discussed openly. Humor had a positive effect on the immune system and elevate the activity of natural killer cells. Improvements in pain thresholds has also been reported. https://www.ncbi.nlm.nih.gov/pubmed/15853164
5- Smiling & social attraction
A smiling person is thought to be a more pleasant, attractive, sociable, sincere and competent than a non-smiling person.
6- Smiling is a universal language that logs into the heart directly and permanently.
7- Smiling is one of the most powerful communication devices, offering benefits to both giver and receiver with few drawbacks. Please Smile always even if you don’t feel the wish to. The world is like a mirror reflecting everything you do; if you smile the world will smile back to you
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8- People who express positive emotion usually have better social outcomes than people who do not
9– You are that smiling guy I met at the party! Socially positive signals promote memory for identities and contexts. https://www.ncbi.nlm.nih.gov/pubmed/15853164
10– There are both physiological and psychological benefits from maintaining positive facial expressions during stress. The increase in heart rate and the reduction in the positive affect is greater in the non-smiling compared with smiling even if they are not aware of their smile.
https://www.ncbi.nlm.nih.gov/pubmed/23012270