"'One' may mean: "We are exactly alike." Some couples strain to duplicate each other, and then suffer the persistent differences or else repress them. They force an unrealistic similarity upon their tastes, their opinions, their priorities, their customary habits. They may do so with the best of intentions; but this "oneness" is no more real than was Adam and Eve's when they covered their differences with clothes. It is a seeming similarity only -- a looking alike -- which makes the marriage a pretense and will finally tire the partners with pretending. For God created each one unique."
-- Walter Wangerin, Jr., As for Me and My House, Th. Nelson (1990).