"marriage was designed to promote a healthy stable environment to raise children. It was also good for the parents, but the point was the chidren."
>>Civil marriage vests those recognized with multiple priveleges, benefits, protections and obligations, very few of which address child raising. Further, the state has never sought to deny recognition as married to couples were one or both parties were infertile, nor strip recognition from couples who elected voluntarily not to bear children. Quite simply, marriage is not and never has been about reproduction.
"I always regarded homosexuals as de facto bachelors, since they cannot naturally produce children."
>>My wife and I cannot naturally produce children--am I a de facto homosexual, and my wife a de facto lesbian? Does the fact that we do in fact have two children inform that question?
"maybe we should only regard married couples with children as legally married in civil law?"
>>Why, when marriage is about far more than biological reproduction? It's principally about establishing ownership of property, establishing clear lines of inheritance, defining guardianship, next of kin, identifying who has the authority to serve as medical proxy, etc. There remains a need to do all of this whether or not one has children.
"This way married heterosexual couples without children have to contribute as much as the rest of the bachelors, to make everything more fair?"
>>If the goal is 'to make everything more fair', we need only recognize them as partners in civil matrimony and vesting them with the rights, protections, etc. we do heterosexual couplesso recognized (i.e., treat them in exactly the same manner we've always treated heterosexual couples seeking recognition as partners in matrimony.)