Marriage is not just a good thing, it is a God thing.
God gave man a mission to look after the garden. He then gave him a Mrs. and we have the first marriage.
God's blueprint for a successful marriage: Leave your parents, be joined to your wife to become one flesh and be intimately connected in every dimension of life.
Then we have joining. It means being superglued together so strongly, that separating the two will result in damaging both. Becoming one flesh is a mystery. As a man an woman come together in marriage, it is God who joins them and makes them one flesh. Finally, "named and unashamed" speaks of intimacy. This refers to mental, emotional, physical and spiritual oneness.