One of the most reasoned and logically sound arguments against homosexual marriage is rooted in the proposition that marriage is moral only so long as it is directed towards a reproductive (or "generative") end. Since homosexual marriage cannot be aimed at such a reproductive end, the argument goes, it is immoral.
Critics of this theory have pointed out (rightly, I believe) that if logically applied, the reproductive justification for marriage would prevent many heterosexual relationships from being considered moral. (For example, see Andy Koppelman's
post on Mirror of Justice.)
Robert George, a professor at Princeton, is a proponent of the reproductive justification for marriage. Last month, he posted a short piece by one of his former students defending the reproductive justification and arguing that it does not, in fact, lead certain kinds of heterosexual acts to be deemed immoral. (The student is
Sherif Girgis, who Professor George identifies as a graduate of Princeton and a Rhodes Scholar currently pursuing graduate work at Oxford.)
You can find the
original post at Mirror of Justice, and should read the work there before continuing on to the rest of this post.
As I read it, Girgis' analysis relies on three main points: some things may be said to be natural while others may called artificial; "natural" organs have a natural function in a way that "artificial" objects do not; and the natural purpose of an organ is implied in any natural use of that organ. I believe that each of those points is mistaken, and I will address each one separately below.
Natural vs. ArtificialGirgis' piece makes a great deal of the supposed difference between things that are natural and things that are artificial, without explaining how he distinguishes these categories. His examples (borrowed from Koppelman) are guns and genitalia. However, it is difficult to explain how one is natural while one is artificial. Both are created by natural processes. Both are composed of natural materials. Both have evolved through a process of selection to suit a particular
set of purposes.
While I'm not willing to say that there is no possible line to draw between the natural and the artificial, Girgis doesn't articulate a clear argument for a primary distinction upon which the rest of his criticism of Koppelman rests.
Natural PurposeGirgis also assumes that there is a definable natural purpose for natural objects, distinct from what those objects are actually capable of doing. Girgis does acknowledge that this is an assumption ("
I have only relied on the idea that organs have natural functions"), but he doesn't acknowledge the extent to which this assumption is central to his argument. He assumes, but does not prove, that natural objects have a function independent of their capabilities. For example:
In other words, unlike knives and guns, natural organs are what they are (and thus have their natural function) independently of what we intend to use them for and even of whether the function that they serve can be brought to completion.
This assumption is foundational to his entire argument, and I contend that it is a rather weak one. What means are there to define a natural function beyond capability? We say that the natural function of an eye is to see, because that is what an eye does. We say that the natural function of a heart is to pump blood, because that is what it does. But if the natural function exists even if it cannot actually be "brought to completion," what defines this natural function?
With regard to the loss of function, Girgis says:
For Koppleman’s objection to succeed, he would have to produce examples of living organs and natural processes that lose their natural function when that function cannot be completed—and by analogy to which the same would be true of genitalia and of intercourse. But there are none.
I would beg to differ. Take, for example, an eye and the process of opening it. We can fairly say that the purpose of opening one's eye, and the natural function of the eye, is to see. However, given a blind person, we cannot say that they are involved in a "visual activity" when they open or close their eyes. Likewise, we cannot say that the joining of genitalia is a "reproductive activity" when the genitalia in question are incapable of actually reproducing.
If, nevertheless, we assert that we can find a natural function for an organ independent of function, why cannot we also do so with "artificial" objects? (Assuming that we even accept the distinction between natural and artificial.) Girgis asserts that artificial objects' purposes are derived from the intent of the actor while natural organs' purposes are derived from nature, but he does not really offer an argument in support of that assertion.
Natural Purpose Imbibed Into ActionsGirgis claims that the natural purpose of an organ becomes an integral part of actions taken with that organ, e.g. sexual intercourse is reproductive in nature because the genitals involved have a naturally reproductive purpose. He says:
So male and female genitalia retain their natural functions to play certain (complementary) roles in the reproductive process regardless of whether we intend that they be so used and even of whether reproduction will be successfully completed (which depends, e.g., on sperm count).
The weakness of this argument can be seen when we consider the multiple natural functions of various organs. (Assuming,
in arguendo, that organs have natural functions in the first place.) Genitalia, for instance, can be said to have more than one natural function: reproduction, yes, but also pleasure. And male genitalia has a natural function in the discard of various wastes from the body.
Is the act of discarding waste thus a reproductive one because genitalia are involved? Is intercourse an excretory act because an excretory organ is involved?
ConclusionWhile I'm not familiar with Girgis' other work (including an award-winning senior thesis at Princeton, according to Professor George), this discussion of the reproductive nature of intercourse seems bogged down by unproven assertions and assumptions. It does little, I think, to set forth a convincing explanation of how intercourse can be considered a reproductive act when reproduction is not an intention or possible result of the intercourse.