Disgust has its evolutionary roots based on our protection from potential threats from substances that could poison or contaminates us. Its action tendency is to expel, to get rid of it. As we are a ultra social species, Disgust evolved also into a kind of aversion from what is different from the major group and normal social rules, providing a fast way to acknowledge that something is not right. That´s why we have a body aversion to things that are against our moral values . Disgust is closely related to traumas and can also be maladaptive in our daily lives.
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