“To wife” does not mean marry.
As for Rachel and Leah and their handmaidens, they also gave them to Jacob to wife. They were property. They were not equal to being a wife of Jacob. Leah and Rachel were.
Polygamy tends to relegate women to simply being property. As that one Mormon elder or prophet said, “I think no more of taking another wife than I do of buying another cow.”
Please if you are going to make statements like that give the source and from where and who made the quoted!
I could not be ready to receive a witness from the Holy Spirit if I saw every thing in the world through jaded eyes either
People keep bringing up Keturah because it goes to the heart of the matter, fulfilling the promises made by God to Abraham, that his seed would fill the entire earth. Polygamy is not the big issue that everyone here today makes of Abraham's acts, it was about seed, and raising a righteous people, God's covenant people. I can't remember how many children he had by her, I think 4 or 5.