Answer
The Song of Songs (a.k.a. Song of Solomon) appears to me to be a series of love poems, perhaps used in an ancient marriage or engagement. It indicates to us that human sexuality is one of God's gifts, and that sexuality is entirely appropriate within the context of a marital relationship. It encourages us to enjoy our sexuality appropriately, and tells us that part of what is appropriate is flaming passion. I do not believe it is an allegory for the relationship between Christ and the church, though I do think it has application to that relationship insofar as the institution of human marriage itself portrays Christ's relationship with the church. I think it can help us understand Christ's passion and love for the church, and that it can help us see what should be our passion and love for him. Nevertheless, the primary application seems to be human sexuality and passion in the marital context.
Answer by Ra McLaughlin
Ra McLaughlin is Vice President of Finance and Administration at Third Millennium Ministries.