Why did God make Eve out of Adam's rib? He could have made her out of anything. Adam was
made out of dirt. Why do major surgery on Adam when dirt would suffice? I have to assume that it was important for us to understand that a man and wife are one flesh. When they are married, both are complete. When they are separated, neither is whole.
“And the Lord God caused a deep sleep to fall on Adam, and he slept; and He took one of his ribs, and closed up the flesh in its place. Then the rib which the Lord God had taken from man He made into a woman, and He brought her to the man. And Adam said: 'This is now bone of my bones And flesh of my flesh; She shall be called Woman, Because she was taken out of Man.' Therefore a man shall leave his father and mother and be joined to his wife, and they shall become one flesh.”
“And the Lord God said, 'It is not good that man should be alone; I will make him a helper comparable to him.'”