> Sometimes inability to bear children has been grounds for divorce or--in the case of royalty--annulment Not just royalty. An annulment means that there was

> Sometimes inability to bear children has been grounds for divorce or--in the case of royalty--annulment Not just royalty. An annulment means that there was never a marriage…because a marriage which cannot produce children wasn't regarded as a marriage (or as less of one), which suffices to demonstrate a strong connexion between childbearing and marriage. > "Why just two people?" is of course trivially easily answered: humans are a socially pair-bonded species. We are also, you may have noticed, two-sexed. This is even more basic to our biology.