Griffiths ( Song of Songs (Brazos Theological Commentary on the Bible) ) suggests that we must interpret the Song’s bodily imagery through the theological lens of Paul’s teaching concerning the body of Christ. “The complex and fluid relations of one body part to another – of hand to arm, of lips to tongue, of skin to blood – together constitute an integral organism that is what it is because it participates in the body of Christ. The parts complement and ornament one another without competing, and they cannot be properly defined or praise without reference to their relation to other parts. They are what they are only because of the relations they bear to other parts, and in this way, they image, very imperfectly, the individuation-by-relation that constitutes the Lord as the most holy Trinity.”
Griffiths goes on to make some Catholic applications of the principle, using it to justify communion in one kind. I disagree, strongly. But that doesn’t undermine the truth of Griffiths’ basic paradigm here.