This is the first time in this thread that it has been put that way, and I think it might be the smoking gun…
So basically:
- Intent - To prevent conception while having sex (morally wrong)
- Moral object - Using a perforated condom during sex (morally neutral)
Since the intent is wrong, the whole act is rendered immoral…
Certainly, a bad Intention is enough to render an act immoral. But it is more instructive to express the Intention differently - even as a good - see below:
The **Act **is: **Using a perforated condom (during sex) **
The **Intention **is: Avoid a Pregnancy this month.
The **Moral Object **of the Act is not what is written above. The Moral Object is not the observable act, but rather
the immediate end to which the act (putting on the condom, withdrawing prior to ejaculation, or such similar acts you might consider, etc.)
is directed towards. *Noting *the Intention, it is clear that the Moral Object is to thwart the natural progress of the marital act - to thwart its “procreativeness”.
We don’t need to go on to consider the Circumstances (which includes Consequences) in light of the problem we’ve struck with the Moral Object. Catholic teaching is that the moral object above is evil.
An intrinsically evil act is an act with an evil moral object. Every knowingly chosen act with an evil moral object is an intrinsically evil act. The intentional (deliberate, voluntary) choice of such an act by the free will is always a sin, regardless of the Intention (the purpose / goal / motivation) and regardless of the circumstances (the good and bad consequences).
From the CCC
*1756 It is therefore an error to judge the morality of human acts by considering only the intention that inspires them or the circumstances (environment, social pressure, duress or emergency, etc.) which supply their context. There are acts which, in and of themselves, independently of circumstances and intentions, are always gravely illicit by reason of their object; such as blasphemy and perjury, murder and adultery. One may not do evil so that good may result from it. *
This same teaching is what makes immoral:
The Act done in each of these cases has an evil Moral Object - directed toward death of a person - notwithstanding that good Intentions may exist (eg. Ease/End Suffering; Protect a Mother).