Wouldn't same-sex marriage strengthen homosexual commitments and provide a healthier society? 

Research shows that even the most committed homosexual couples — particularly male homosexual couples — view monogamy as unnecessary. Researchers McWhirter and Mattison found that homosexual couples who had been together at least 5 years had incorporated some provision for outside sexual activity in their relationships.[i] Marshall Kirk and Hunter Madsen (Harvard-educated, homosexual researchers) concluded the same thing: “the cheating ratio of ‘married’ gay males, given enough time, approaches 100%.”[ii]  

How does your neighbor’s same-sex marriage undermine your marriage?

Legal recognition for openly non-monogamous gay unions would effectively destroy the taboo on adultery. The result is a continual downfall of families and society.

Stanley Kurtz, a research fellow at Stanford University explains: “What we need to understand — but do not — is that gay marriage will undermine the structure of taboos that continue to protect heterosexual marriage — and will do so far more profoundly than either the elimination of sodomy laws, or the general sexual loosening of the past thirty years. Above all, marriage is protected by the ethos of monogamy — and by the associated taboo against adultery. The real danger of gay marriage is that it will undermine the taboo on adultery, thereby destroying the final bastion protecting marriage: the ethos of monogamy.”

Isn’t love the only valid requisite for marriage?

There are many forms of love, but they are not all a basis for marriage. We love our close family members, but it is illegal to marry them. If we love another person besides our spouse, we cannot marry them. We love our dogs, but we cannot marry them. We may love someone of the same sex, but that compassion is not a basis for marriage. For centuries, cultures have limited the definition of marriage to exclude incest, adultery, bestiality, and homosexuality.

What’s the big deal?

In Sex and Culture,  anthropologist J.D. Unwin wrote found that societies that practice “absolute monogamy,” in which sex is restricted to lifelong heterosexual marriage, tend to grow and prosper; societies that depart from absolute monogamy invariably decline. 

John Adams wrote in a letter to Thomas Jefferson, “Have you ever found in history, one single example of a Nation thoroughly corrupted that was afterwards restored to virtue?...And without virtue, there can be no political liberty…Will you tell me how to prevent luxury from producing effeminacy, intoxication, extravagance, vice and folly? I believe no effort in favor of virtue is lost.”[iii]