While many people oppose same-sex marriage, there are really no valid reasons against it. If your daughter told you she wanted to marry another woman because she loved her and it would make her completely happy, would you oppose it? If you really think it through, you might find it’s not as easy to answer the question as you thought. First let’s look at some of the common reasons against same-sex marriage.

One of the reasons someone might give against same-sex marriage is that it goes against nature. Well, what is nature and how does it go? Merriam-Webster Online Dictionary cites nine separate definitions of nature, one of which is, “the inherent character or basic constitution of a person or thing”. Given that definition, I can’t say that same-sex marriage goes against nature. Others say that it there is not a traditional family structure, which...