 An expressivist would presumably deny that there is a worldly state of affairs of its being bad to have another Dr. Pepper. There is the aversion to drinking another Dr. Pepper, of course. But the claim that it would be bad to drink another Dr. Pepper is not a psychological claim. It is not a claim about an aversion, although it expresses an aversion. That is, this aversion is not a state of affairs that makes it true that it would be bad to drink another Dr. Pepper. It is a psychological state that we express in saying it would be bad to drink another Dr. Pepper.