No, you don’t need to live together to figure out if you’re compatible.
Is the Song of Songs a celebration of marital intimacy or an allegory of Christ and the church? Yes.
Why does God care who we sleep with? Because he cares deeply about the people doing the sleeping. He cares because sex was his idea, not ours.
More than insightful cultural analysis, Christians need a positive vision for how our sexual ethic applies to culture.
The arithmetic is simple: infinite occasion + unchecked desire = disaster.