Originally Posted by invocation
One simply is not allowed to do any of this using “articificial” or “unnatural” means which undermines the freedom of the individuals and thus the relationship of the couple as well.
Since the “this” in my quote referred back to the paragraphs previous, your response here is not much of a response. Obviously if the couple or a member of the couple enters the marriage with the intention of having NO children, despite being physically able, then the Catholic Church considers this grounds for an annulment. But other than this desire to have a child if physically possible, the Church does not set a quota on how many children you have to have in order to be Catholic.
Back to Humanae Vitae, since that is where you should be focusing. The problem, according to Humanae Vitae is that human beings, when it comes to sex, tend to act on impulse, like animals, and without freedom. In other words they are driven by lust. Artificial birth control only reinforces this tendency, the documents argues, because it makes people feel like they can act on impulse and there will be no consequences to their actions. Thus instead of bringing couples closer together, it allows them to avoid any conversation about the significance what they are doing; and instead of being an expression of freedom one acts on instinct and fails to either act like a person or approach the other person as a person.
Notice that this is true even if the couple is NOT using birth control of any sort. If they are not communicating and planning they are falling into the same error. Birth Control simply makes the error easier for some people because the error is not accompanied by one or more children a year.
Instead, says the Church, we want human beings to take rational control of their sexuality and reproduction within marriage. We want free human beings. This requires that the couple communicate with one another about sex, their desires for sex, whether it is appropriate to have sex in certain instances, whether they wish to have a child or another child at this time, and finally how many children they might like to have and when, and ultimately, of course, have some self-discipline. The document makes clear that when the couple has this kind of relationship with one another their own humanity is strengthened because their actions are more in accordance with rational freedom and the union between the couple is strengthened because of the heightened intimacy (in this case, not immediately sexual). The document is also explicitly clear that couples can have sex with one another with the intention to not get pregnant.
So yes, you are right. It is much more complicated than natural or unnatural. I don’t think I suggested otherwise. The focus of Humanae Vitae is on whether the couple, within the intimacy of their sexual relationship, are acting in a manner that furthers or hinders their freedom, both as individuals and as a couple in relation to each other.