If you want to strike up a new relationship, simply smile. It works because people are much more attuned to positive emotions when forming new bonds than they are to negative ones such as anger, contempt or sadness. Don’t try to fake it, however, because people can recognize a sincere smile a mile away. This is according to a study led by Belinda Campos of the University of California, Irvine, in the US that sheds light on how relationships are formed and maintained.

Source: Friendships start better with a smile