The Hidden Smiles photo series by Réhahn, a photographer hailing from France, will make you smile, big and proud. After all, such a form of expression is incredibly contagious, hidden or not. But what makes this photo series particularly fascinating is the history behind why Vietnamese people have the habit of hiding their smiles.
First of all, they are hiding their white teeth. My Modern Met writes, "This mysterious smile dates back hundreds of years, to a time when a common belief was that only evil spirits, savages, and wild animals possessed long, white teeth." Yet what intrigued the photographer was how much emotion was still present in his Hidden Smiles series. Such expressions extend way beyond the mouth.