Katherine Kersten is a senior fellow at the Center of the American Experiment. She writes in the StarTribune:

Sometimes you have to take an argument to its logical conclusion to see its flaws.

I'd guess, for example, that 95 percent of Minnesotans would oppose redefining our marriage laws to include temporary marriages, where the partners' marriage certificate includes an end date; marriages of three or more people (say, two lesbians rearing their child with a gay male sperm donor), or marriages between siblings in a nonsexual relationship.

Yet how would such marriages hurt anyone else's marriage? If the individuals in question love and care for each other, isn't that all marriage is about? Doesn't love make a family? Don't people bound by affection deserve the benefits of marriage -- and suffer stigma if these are withheld? If you disagree, aren't you discriminating against others' "fundamental right" to marry as they wish?

These questions are, of course, the same as those posed by same-sex marriage advocates to fellow Minnesotans who support preserving one-man/one-woman marriage in our state Constitution.

...Marriage has always and everywhere been a male/female institution because it is rooted in biology and human ecology. Across the globe and through the millennia, its public purpose has been the same: To connect men with their children and the mother who bore them, so that every child has a loving, committed mother and father.