If you’ve been in the same space with a person who got a really exciting news and let out genuine happiness, isn’t it almost impossible for you not to smile? How’s the default expression of your face? What does it say about you? Does it speak friendly of you? Does it repel? Does it attract? It’s never a question of smiling alone, but letting out a genuine smile. 
Smiling is an art. Learn it! … More  Why Smiling Should Be a Part of You