It's common sense not to married someone young enough to be your daughter. A early 40 year-OLD man married a 16 or 14 young girl is sick.Ok, I see this going in weird places so I (as a member of the Church of Jesus Christ of Latter-Day-Saints) would like to give this answer coming directly from the official church website. I invite all with other questions to check it out. www.lds.org
What is the Churchs position on polygamy?
In 1998, President Gordon B. Hinckley made the following statement about the Church's position on plural marriage:
"This Church has nothing whatever to do with those practicing polygamy. They are not members of this Church. . . . If any of our members are found to be practicing plural marriage, they are excommunicated, the most serious penalty the Church can impose. Not only are those so involved in direct violation of the civil law, they are in violation of the law of this Church."
At various times, the Lord has commanded His people to practice plural marriage. For example, He gave this command to Abraham, Isaac, Jacob, Moses, David, and Solomon (Doctrine and Covenants 132:1).
In this dispensation, the Lord commanded some of the early Saints to practice plural marriage. The Prophet Joseph Smith and those closest to him, including Brigham Young and Heber C. Kimball, were challenged by this command, but they obeyed it. Church leaders regulated the practice. Those entering into it had to be authorized to do so, and the marriages had to be performed through the sealing power of the priesthood. In 1890, President Wilford Woodruff received a revelation that the leaders of the Church should cease teaching the practice of plural marriage (Official Declaration 1).
Sorry for the long post but I hate to have misconceptions floating around out there about us.