Clement Rosset puts it very well: every time the emphasis is put on a lack that desire supposedly suffers from as a way of defining its object, the world acquires as its double some other sort of world, in accordance with the following line of argument: there is an object that desire feels the lack of; hence the world does not contain each and every object that exists; there is at least one object missing, the one that desire feels the lack of; hence there exists some other place that contains the key to desire (missing in this world).