They are perfectly matched but totally opposite. In addition, God's Word says that these two people become one. Understanding this can greatly enhance a marriage, because it virtually eliminates the idea that one person is subservient to another. They are merely different for the purpose of accomplishing various functions. One hand working alone will not accomplish half as much as two.
Many tasks are impossible without two hands working together.
It is truly enlightening to see how opposite couples really are. It would seem that opposites do indeed attract. One will get up early, while the other stays in bed. Unfortunately, in any relationship, a balance is hard to reach. Usually one spouse's personality will overwhelm the other, and that spouse ends up making most decisions, including financial decisions.