Adam was divided into two beings — one masculine, and one feminine. This division was not just in the physical realm; it was also in the spiritual, mental and emotional realms. That’s why a strictly physical relationship on earth does not fully satisfy the desire of men and women for companionship. There must be a relationship not affected by time or space or death — a relationship that unites two souls, two minds and two hearts.
Spiritual glorified bodies do not have reproductive organs, because flesh and blood do not enter Heaven. The same is true for a man. In Heaven he lives in a spiritual body. He still looks like a man, and he is still masculine, but he is no longer male.
2/ When God made Eve for Adam, He instituted eternal companionship, because there was no death at that time.
3/ The masculine is not complete without the feminine, because in Adam they were created as one.
4/ Every child born to Adam’s race is only half of a perfect one.
5/ Love is eternal.
6/ Everyone of us, just like Jesus, desires an eternal companion.
Therefore, just as God made food for hungry bodies, and air for birds to fly in, so He has made paradise for sweethearts. But the only way to that paradise is Jesus — the way, the truth, and the life (John 14:6).
SOME QUESTIONS ANSWERED
A/ Yes. Just as God chose Eve for Adam, so He will choose companions in Heaven. Jesus was not married on earth, but Rev 19:1-9 records His marriage in Heaven.
A/ Many married Christians have a companionship that includes mental, emotional and spiritual satisfaction. They share a love that distance cannot hinder, time cannot diminish, and death cannot finish. And since their life on earth is a happy one, they desire to be together in Heaven, and I believe God will grant their desire. On the other hand, many marriages are unhappy, but don’t let an unhappy marriage turn you against the covenant companion concept. God made for Adam a companion he would not part with; and He knows how to choose the perfectly satisfying companion in Heaven for every saved child of Adam’s race. If we keep His rules here, He will keep His promises there.
A/ A biological response is not love; it is only an expression of love, as you have said. But God had to make it the only physical intimacy or the race would not continue. In Heaven there are seven intimacies, but they are spiritual, and any one of them would make the earthly relationship seem like a bad dream by comparison.