Child brides, Harems and Polygamists

As Christians argue for traditional marriage, is "traditional values" adequate?

Doug Wilson says"NO":  

" The sexual traditions of humanity, considered apart from God's Word, have contained way too many child brides, harems, serial polygamists, and concubines to provide us with the appropriate guidance here."

If we haven't sold the farm by labeling the first chapters of Genesis mere poetry or myth, we have lots of arguments:

"Reasoning by analogy from this, we can see other expressions of sexuality are excluded. A man should not be allowed to marry himself. It is not good that man should be alone (Gen. 2:18). A man should not be allowed to marry multiple wives. God said that He would make a helper suitable to him (Gen. 1:18). Bestiality is excluded. Adam did not find a helper suitable to him among the animals (Gen. 2:20). Homosexuality is excluded because God brought Adam a woman, and not another man (Gen. 2:22). And divorce is excluded because God is the one who brought the man and woman together (Matt. 19:6)."

The entire post can be found here.