Disgust is an emotional response of revulsion to something considered offensive, distasteful, or unpleasant. In The Expression of the Emotions in Man and Animals, Charles Darwin wrote that disgust is a sensation that refers to something revolting. Disgust is experienced primarily in relation to the sense of taste (either perceived or imagined), and secondarily to anything which causes a similar feeling by sense of smell, touch, or vision. Musically sensitive people may even be disgusted by the cacophony of inharmonious sounds. Research continually has proven a relationship between disgust and anxiety disorders such as arachnophobia, blood-injection-injury type phobias, and contamination fear related obsessive–compulsive disorder (also known as OCD).
Disgust is one of the basic emotions of Robert Plutchik's theory of emotions and has been studied extensively by Paul Rozin. It invokes a characteristic facial expression, one of Paul Ekman's six universal facial expressions of emotion. Unlike the emotions of fear, anger, and sadness, disgust is associated with a decrease in heart rate.
Inside Out is a 2015 American 3D computer-animated comedy-drama adventure film produced by Pixar Animation Studios and released by Walt Disney Pictures. The film was directed and co-written by Pete Docter, co-directed and co-written by Ronnie del Carmen and produced by Jonas Rivera, with music composed by Michael Giacchino. The film is set in the mind of a young girl named Riley Andersen (Kaitlyn Dias), where five personified emotions—Joy (Amy Poehler), Sadness (Phyllis Smith), Fear (Bill Hader), Anger (Lewis Black), and Disgust (Mindy Kaling)—try to lead her through life as her parents (Diane Lane and Kyle MacLachlan) move the family from Minnesota to San Francisco and she has to adjust to her new life.
Docter first began developing Inside Out in 2009 after noticing changes in his daughter's personality as she grew older. The film's producers consulted numerous psychologists, including Dacher Keltner from the University of California, Berkeley, who helped revise the story by emphasizing the neuropsychological findings that human emotions affect interpersonal relationships and can be significantly moderated by them.