The editors at National Review make an
excellent argument in favor of maintaining the traditional view of marriage and rejecting the arguments proffered on behalf of same-sex marriage. Here's an excerpt:
Both the fact that we are debating same-sex marriage and the way that debate has progressed suggest that many of us have lost sight of why marriage exists in the first place as a social institution and a matter of public policy. One prominent supporter of same-sex marriage says that the purpose of marriage is to express and safeguard an emotional union of adults; another says that its purpose is to make it more likely that people will have others to give them care in sickness and old age.
So at the risk of awkwardness, we must talk about the facts of life. It is true that marriage is, in part, an emotional union, and it is also true that spouses often take care of each other and thereby reduce the caregiving burden on other people. But neither of these truths is the fundamental reason for marriage.
The reason marriage exists is that the sexual intercourse of men and women regularly produces children. If it did not produce children, neither society nor the government would have much reason, let alone a valid reason, to regulate people’s emotional unions. (The government does not regulate non-marital friendships, no matter how intense they are.) If mutual caregiving were the purpose of marriage, there would be no reason to exclude adult incestuous unions from marriage. What the institution and policy of marriage aims to regulate is sex, not love or commitment.
If you're chary of same-sex marriage but not sure how to best respond to those of your friends who challenge you on the issue, this article is a must-read.