Body Language and Smiling
Smiling is a universal sign that someone is happy. It conveys a message that you are not dangerous, and asks people to accept you on a personal level. The most remarkable thing about smiling is its contagiousness – when you smile to someone, it makes them reciprocate by returning the smile. Interestingly it is true with both – sincere and fake smiles. According to some scientists, there is a neuron that affects part of the brain that is responsible for the recognition of faces and facial expressions. This neuron causes the ‘mirroring’ reaction when you see smiling or frowning faces. In other words, it causes you to copy facial expression that you see.