The Bridegroom of the Song celebrates the physical beauty of his Bride. For most of church history, this was seen as a human type of Yahweh’s love for Israel and Christ’s for the church.
Christ too has a bride, who is one-flesh with Him, the bride who is His body. And the New Testament includes some Pauline blasons on the beauty of the bride-body (Romans 12; 1 Corinthians 12). For Jesus too admires His Bride, delights in her, desires her for her beauty, since He finds her, as Solomon did, without blemish (Song of Songs 4:7).
