Is It a Metaphorical Use of Disgust?

When some one says that they are disgusted by another person's actions, something they consider immoral or unethical, may be cruel. Is that something that you consider disgust, an extension of the food discussed, or is it more, in your view, metaphorical? It does seem that when moral violations are called disgusting, they often have a bodily component to them,. But what if i say, i'm disgusted by the actions of, let's say, a politician. I can't imagine there's actual nausea attached to that, for instance?"...