ah but here’s the difference between most areas of morality (don’t murder, don’t steal, etc) and something like masturbation.
nature isn’t an excuse for murder because we can point to the harm it does another person.
but when violating nature is given as the REASON masturbtion is wrong, then citing its place in nature is of absolute relevance.
First of all, my point is that you are not using the word “nature” correctly. In point of fact, you are equivocating between two different uses of the word “nature” – the one relating to human nature (as Catholics use it), the other relating to the material world (as atheists use it).
It is not appropriate to do so. In fact it’s no wonder you can’t make sense of the teachings – you are not using the appropriate language.
Disregard the idea of nature as a place. Think solely of human nature: that which arises from the form or essence of man.
As for harm, there’s no sense talking about it without first deciding what constitutes harm. If you mean physical harm than you have simply begged the question by elevating the material over the spiritual.
questionable definition of “nature”, and its use in this discussion contains questionable presumptions about “essential”
This is what is meant by “nature” when talking about “natural law.” Hence this is what “nature” is as far as discussions about natural law are concerned. You do realize a word can have more than one definition, yes?
this assumes A: that there is only one single utilitarian purpose for every creation, and B: that the utilitarian purpose is the ultimate purpose.
We know EXACTLY what candy bars exist for. We know this because WE MAKE THEM.
You aren’t seriously denying that chairs are made for the purpose of sitting, are you?
it points to ONE end of reproduction, which is not the ONLY end…
Correct – the other end is spousal unity. But this itself arises from the procreative nature of the sexual faculty. If sex were not procreative there would be no reason for it to be any more unitive than a handshake. Or are you seriously quibbling with the description of the
reproductive system as being primarily concerned with
reproduction? Hence the fact that it is constituted in such a way as to maximize the possibility of reproduction (e.g., the strength of the human sex drive, the various chemical signals emitted by women during ovulation alerting men of their fertility, the shape of the phallus and vagina both, etc.)?
This isn’t even about natural law anymore – it’s basic science. You are spitting in the face of evolutionary biology AND psychology AS WELL AS natural theology.
and the “hence” isn’t some kind of automatic conclusion either. A tree serves a purpose of fruit. Does this mean that children who use the tree as a play fortress are degrading it if they don’t eat some fruit afterward?
Oy vey.
AT WORST it can be said that it chopping down a tree is bad for the tree. This does NOT imply an obligation on the part of humans to the tree. (Does building a tree fort in a tree somehow interfere with the ability of the tree to produce fruit? No. Then it’s not even bad for the tree, is it?)
Natural law as a MORAL SYSTEM only governs HUMAN BEINGS, who alone have reason, will, and moral agency – and who therefore can ELECT to live in a manner consistent with their natures or else to REBEL against their natures (against the order God Himself has ordained for them). There is no sense talking about a tree having moral duty since the tree has no soul – no reason, no will, no moral agency, merely blandly deterministic processes moving programmatically toward its ends.
This is beside the point, as I believe there are other ends of sexuality that are every bit as central to its purpose as procreation, but even if we were to concede procreation as the sole position #1 primary purpose, the “hence” part doesn’t make much sense.
No offense, but you clearly don’t know the first thing about natural law. So on what basis do you propose to rebel against it? Every word you write is shot through with obvious misapprehension.
Do your homework;
this book is a good place to start in learning about natural law. And quit rebelling against the magisterium of the Church – you have a duty in Christ to submit to their ecclesiastical authority even if you have doubts.