Sex Is Profound
Marriage is profound, as Paul tells us in Ephesians 5:32. It is a mystery. Two become one. The depths of what this is really about transcend the definitions of any government. It refers to Christ and the church.
John Piper writes,
Leaving parents and holding fast to a wife, forming a new one-flesh union, is meant from the beginning to display this new covenant — Christ's leaving his Father and taking the church as his bride, at the cost of his life, and holding fast to her in a one-spirit union forever. (Momentary Marriage, 30).
And while sex itself does not make marriage, it certainly is meant to be a sign of marital union. It's a reaffirmation of oneness, and a celebration of the covenant that makes it so. So if this is what sex means, and marriage is "designed by God to reflect and display the…