Crying is a typical human expression of emotion. Surprisingly, until now little scientific attention has been devoted to this phenomenon. Many textbooks on emotion fail to pay attention to it, and in scientific journals there are hardly any contributions focusing on this behavior. In contrast, there is much interest from the lay public, allowing pseudo-scientists to formulate theories that have little or no scientific basis. Is there any evidence in support of statements that crying is healthy or that not crying may result in toxification? How do people react to the crying of others? Is...