Paul Ekman (born February 15, ) is an American psychologist and professor emeritus at the University of California, San Francisco who is a pioneer in the study of emotions and their relation to facial xtrmtracker.com: Psychology, Anthropology. Facial feedback theory: how Botox makes you less empathetic. Gauri Sarda-Joshi 16/Nov/ Body Communication Emotion. Our own facial expressions play an essential part in understanding other people’s emotions. Human learn to show emotions through facial expressions very early in life. Babies learn how to express happiness and . Ekman and Friesen’s () study on the universality of facial expressions found that there were no significant differences between Westernized adults and .