Though civilization's progress has moved closer to the protection of children, there remains a global concern over child brides. See this short video on the problem at http://sub.1006playlist.com/groom-child-bride-pose-pictures-public-now-watch-passers-react/.
Children deserve to have a child hood, and the law must provide for their best interests. Learn more at Tracing the Foundations of the Best Interest of the Child Standard in American Jurisprudence. Being a child bride is never in the child's best interests, and indeed places girls and their futures at great risk.