“This article is in need of attention from a psychologist/academic expert on the subject. Please... Why we smile? “Assessment| Biopsychology| Comparative| Cognitive| Developmental| Language| Individual... Cough Pages in category "Nonverbal behaviour" The following 2 pages are in this category, out of 2 total. C CoughW Why we smile? Retrieved from "http://psychology.wikia.com/wiki/Category:Nonverbal_behaviour"