Genesis 2:18-25
Then the Lord God said, "It is not good for the man to be alone;" --
This is the first time God said something was "not good."
I will make him a helper suitable for him." --
God said that this help-meet would be according to his opposites: where he was strong, the helper could be weak; where he was weak, the helper would be strong. Only together would they be complete.
And out of the ground the Lord God [had] formed every beast of the field and every bird of the sky, and brought them to the man --
God already knew all that He had made; now the man needed to know his need.
To see what he would call them; and whatever the man called a living creature, that was its name. And the man gave names to all the cattle, and to the birds of the sky, and to every beast of the field, --
So the man had to have high intelligence to be able to pick up all the defining characteristics of each animal to think up what to call each one.
But for Adam there was not found a helper suitable for him. --
So among all the animals that inhabit this Earth with us, there is not any of them that would be an appropriate mate. People love their dogs and other pets as "part of the family," but they don't belong to the human family; not even the monkeys or apes that seem physically very similar to us would be appropriate or suitable as a mate.
So the Lord God caused a deep sleep to fall upon the man, and he slept; --
Similar to how the doctor would administer a sedative to the patient prior to surgery.
Then He took one of his ribs, and closed up the flesh at that place. --
God Himself performed the surgery on Adam to remove a part of his body, and closed up the surgical wound hygienically.
And the Lord God fashioned into a woman the rib which He had taken from the man, --
While He was making this part into a whole person, however He did this to grow a woman; at the same time Adam was still sleeping, healing completely from the surgery.
And brought her to the man. --
God fashioned the woman to be the physical counterpart to the man. He didn't make Adam and Steve, nor did He make Ellen and Eve. And God brought this woman to the man He had made to be his mate.
And the man said, "Now, this is bone of my bones, and flesh of my flesh; she shall be called Woman because she was taken out of Man." --
When Adam saw her, the first word out of his mouth was "Wow!" [how "now" is pronounced in the Hebrew language], when he beheld the most beautiful being he had ever seen--she was just like him (bone and flesh), but delightfully different! He was in love at first sight!
For this cause [Marriage] a man shall leave his father and his mother, and shall cleave to his wife; --
God invented marriage, and God brought the woman to the man to be his wife: God officiated at the wedding, and the Son and the Holy Spirit were the witnesses. When a man and woman marry, they create a new family, and no longer are subject to their parents as they had been as children. They will be the parents in this new family.
And they shall become one flesh. --
This is what marriage is: one flesh. This describes a physical connection that is only physically possible with a man and a woman. Two of the same gender are physically unable to accomplish this intimate union.
And the man and his wife were both naked and were not ashamed.
At this moment in our human history, there was no need to cover our bodies because there was no sin, no temptation and no death yet in this world. So there was no shame.
God gave us Marriage primarily to show us the intimate one-ness He wants to have with us spiritually. And the result of this one-ness physically with a man and his wife is the producing of children, a special gift from the Lord God to us, to make us into families and continue the human race in this world for as many generations as He has decided to allow us to go on.
In the Old Testament, Israel was God's wife; in the New Testament, the Church is the Bride of Christ. God loves us passionately, as a newlywed husband is enamored with his new bride.
Even so, come, Lord Jesus!
