Some people will not smile, some will only smile inside their hearts, some smile on the outside, but not inside (fake smiles), some smile on the outside and inside (true smiles).
Scientists have manage to classify laughs into three different catergories: hahaha, hehehe and hohoho; all of which have different characteristics of its own. They also have concluded that when you laugh, you will also sub-consciously smile at the same time.
Hope you don't get accused of cheating if you smile during your exams.
ave6
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