One of the hot button issues in our culture is homosexuality and the related issue of same-sex marriage.  I have offered a non-religious argument against both (here and here).  As I have continued to reflect on these issues, however, I am persuaded that a non-religious case against homosexuality is much more difficult to make than the case against same-sex marriage.  One reason for this is the fact that the case against same-sex marriage can be made purely on policy grounds without any recourse to moral judgments.  One could believe homosex is morally irrelevant and still be opposed to the government regulating same-sex relationships.  Moral judgments, however, are not so easily divorced from one’s view on homosex.

Take for example the argument from natural law.  We argue that the natural purpose of our sexual organs requires heterosexual sex.  To use our sex organs in such a way that their natural purpose cannot be realized is morally wrong.  There are a few reasons why this will not be convincing to many who think homosex should not be opposed.

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