Why smiling is beautiful

Lol my eye makeup is all over the place but who cares its about smile's all round! ◕‿◕‏ܔܓܜ Zahra4eva ܜܔܓ‏

Smiling doesn't seem like a particularly complicated act: You feel a happy emotion, the corners of your mouth turn up, your cheeks lift and your eyes crinkle. The overall effect tells the outside world that you're feeling happy on the inside. It's simple and, in most cases, totally spontaneous. We typically smile without making a concerted effort to do so.
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Smiling can make others happy. 
"When you're smilin', the whole world smiles with you." Ever heard that song, made famous by Louis Armstrong? Well, it's true. Research shows that smiling is contagious. Ever been around someone who just had something fantastic happen to him or her? Isn't it almost impossible not to feel good, too? Studies show that something as simple as seeing a friend smile can activate the muscles in your face to make that same expression, without you even being aware that you are doing it. Crazy, right?