In desiring some X, more than likely you are desiring to be the sort of person who could be satisfied with X, or to be seen as such a person, and all the more if indeed all desire is mimetic. Thus the 'organ' at work is the sense of being, which is in play whether you are aware of it or not, whether you can 'see' that that is what you are after or not. This is what you have in common with all other living beings and links you to them. The sense of being in this cannot be separated from the sense of the possibility of non-being - to be in life is to be on the knife edge between being and non-being, or as it seems, between life and death.