Where are you getting it, that a couple could choose to do this? Has the Church ever allowed this?
I don’t have an official Church teaching (i.e., something from the magisterium) that says married people must attempt to have biological children, if they are capable of conceiving. I
do know that refusal to have children is a ground for declaration of nullity. Physical inability to have children does not nullify a marriage.
I would even go so far as to say that a couple
could, in an individual case, resolve to use moral means, as you put it, to avoid ever having children even if they are not sterile — grave eugenic reasons (i.e., if they had a child, the child could be foreseen to have massive problems), grave psychological reasons (one of the spouses could be mentally incapable of properly caring for a child), and so on.
Yet in these cases, if the spouses are not going to have a Josephite marriage, they would have to accept that, however remote the likelihood might be (if moral means are used with maximum caution), a child might be conceived and born. What then? I would seriously have to question whether a couple in these circumstances is called to marry in the first place, or whether they should reconsider and remain single. Catholics blithely throw around the phrase “maybe you’re not called to marriage”. Perhaps this would be a case of that.
Again, I would welcome the (name removed by moderator)ut of a priest, or lay person thoroughly schooled in sacramental theology, to tell us
- whether a married couple, who do not know themselves to be infertile before the marriage, must resolve to attempt to have at least one biological child, to contract a sacramentally valid marriage
- and if not, why not, and what exceptions there would be to this
It is one of those things that is “just understood”, that fertile married people enter into valid Catholic marriages with the intention of having at least one child. Prior to the last few decades, for a couple to say “we’re not ever going to have any children” would have been seen as grotesque and very,
very selfish. (Admittedly, the intention of adopting foster and orphaned children, in lieu of having one’s own biological children, would not be in the least bit selfish.)