In the 1981 CTCR report entitled 'Human Sexuality: A Theological Perspective' there has always been a line of reasoning that has not set well with me.
On pg. 19 we read: "In view of the Biblical command and the blessing to 'be fruitful and multiply,' it is to be expected that marriage will not ordinarily be voluntarily childless. But, in the absence of Scriptural prohibition, there need be no objection to contraception within a marital union which is, as a whole, fruitful."
Two things bother me here: First, it is implied here that Scripture's lack of prohibition on a topic is equivalent to license. While it is true that we dare not add to scripture, does not scripture inform us as members of the Body of Christ how to navigate in the midst of any number of topics that the Word is not explicit about? (Of course, even that is working with their assumption that Scripture is silent on the matter - something our older brothers and fathers in the faith who were not as wise in the wisdom of the world would have scoffed at.)
Second, and more disturbing to me is the culmination which refers to marriages being O.K. which are "as a whole, fruitful." Is this really a helpful way to talk about this? I would suggest not. Wouldn't it be alarming to arrive at a church in Timesgoneby where the door-to-missions was closed because the Great Mission Fest of '87 had seen the Word of the Lord bring a family of four to the Faith. Say what you will, but the Bride of Christ Timesgoneby was "as a whole, fruitful."
Yet, when it comes to that other Bride and Groom - the Sons of Adam and the daughter's of Eve - whose marriage gives witness to the Lord Jesus the Christ - do we really do well to qualify the Lord's command/promise to be fruitful and multiply with "as a whole"? Again, I would suggest not.
In an effort to guard against taking a strong, historic, orthodox church (which they feared to be legalism?), they have entered into a whole new legalism - splitting hairs, qualifying the Lord's command/promise, and demonstrating to the Lord their faithfulness to his command by quantifying for Him their fruit.
Human Sexuality: A Theological Perspective - CTCR 1981