Was not the goddess, before she became completely anthropomorphic, a “Corn Mother,” the ripe corn being taken as a maternal entity?
Jung and Kerényi argue that Demeter’s treatment of Demophoon enacts the logic of the grain and raises the question of whether her motherhood was originally a corn-fertility function rather than a purely anthropomorphic one.
, Essays on a Science of Mythology: The Myth of the Divine Child and the Mysteries of Eleusis, 1949thesis