If there IS sex in heaven, I'm just curious -- and I'm asking out of sincerity, not sarcasm.
Solomon was married to the Pharaoh's daughter, along with many other wives and the Bible mentions 1000 concubines.
David had 8 names wives, but the Bible says he too had many others.
Do you think God will just pick one for them to have in heaven, or will they be allowed to spend time with each one?
And if only one woman is picked, what happens to all the others who were married?
Because if the married are allowed to keep having sex in heaven, it means they should have a right as well. But with who, if not their one earthly husband?
Those questions you asked are the type of questions I designate as having simple answers with the only problem being finding those simple answers.
I've wondered about a lot of quandaries. Example: two christians marry and have two kids, but the husband goes off to war or military service and disappears in a battle or skirmish. For all the military knows, he is dead, and the news gets back to his wife who, in the course of a year or two, remarries another christian man with whom she has two more kids. The one day, her first husband reappears. The enemy had taken him captive where he was for several years but managed to escape. The Bible says that a widow (or widower) can remarry. His wife remarried, but he was never dead.
What is God's answer for this quandary? Is the first (and, really, true) husband supposed to drive off the new husband with his two kids and re-do his vows with his wife (since they're actually still married in a way) and move back in?
I once met a minister who was with his wife. I knew nothing about him, but I was disturbed that my spirit was picking up that they were not married and that his wife... was not his wife. I had no idea what this was about. A few days later, I learned from several other people in his ministry that the minister's wife had specifically left her own husband to marry this minister. Then I understood why my spirit sensed that they weren't married and that the wife wasn't the ministered wife. My spirit was discerning that
as far as God was concerned, this marriage was not recognized in the spirit realm or by God as a [legitimate] marriage at all. So, while they were married, God didn't recognize them as husband and wife. So, this marriage thing isn't necessarily always simple. But God has the answers for all these quandaries.
I don't presume to know much about marriage, sex, and childbearing in eternity. I just know that all those things might be relevant, legitimate, and allowed in eternity. I don't let my or other people's understanding of Scriptures box me in so I can grow and learn things that others may think obsolete or impossible. For example, catholics talk about purgatory. While we know there is no purgatory, there is ample evidence that there is what I call 'an in-between place' between the land of the living and Heaven or Hell or the land of the dead. When one acknowledges that a.) no one can go to God but through Jesus Christ, that b.) many people die without having a chance to go to God through Jesus, and that c.) God will not condemn people who had no chance to be saved in 'the land of the living', it begins to become apparent (logically, not from a religious mindset) that there must be 'an in-between place' (or in-between places) where those who die before having a chance to be saved (aborted babies, children who die young, people who never heard of Jesus, etc.) do get a chance to be saved after they die. If this isn't true, then one would be hard-pressed to explain how God is loving and just but manages to 'follow the rules' (salvation through Christ alone) for those who die before having a chance at salvation. Lucky for us here, the Bible does mention some 'in-between places' like Sheol, the Grave, and Paradise and also tells us that Jesus 'preached' to those who died without Him (1Peter 3). However, I don't care for the proper names of 'in-between places' where people get a chance at salvation
after death. I just know they exist
through force of reason.
I believe the same 'logic' above applies when there are puzzles and quandaries regarding marriage, sex, and childbearing in eternity. I wouldn't be surprised if these things happen in eternity. In fact, I'd be surprised if sex is nullified in eternity. But as I said, I don't think much about it and I'm not worried about getting to eternity unmarried. It's just one of many things I ask God questions about. God knows how to sort out a plurality of wives for one husband (or husbands for one wife) and all other marriage quandaries in eternity. Our part is to not ask about it, ask and then give up, or ask and keep asking till He reveals those mysteries to us. I want to ask and keep asking till God reveals these things to me, because I've learned that God truly delights in those who pursue Him-- those who want to know Him on a deeper level than most (like Moses, as opposed to the rest of Israel, to whom God said,
"Come up to Me on the mountain and be/stay there"-- Exodus 24:12). I believe that if I ask and keep asking about these mysteries regarding marriage, sex, and childbearing (I doubt I'll pursue unless I make time), He'll tell me as He has done with many mysteries in the past and up till now.