Blue-eyed men prefer blue-eyed women, apparently because eye color can help reveal whether their partner has been faithful, researchers said on Monday. "Before you request a paternity test, spend a few minutes looking at your child's eye color," Bruno Laeng and colleagues at the University of Tromso in Norway said in the study. Under the laws of genetics, two parents with blue eyes will always have blue-eyed children, it said. So a blue-eyed man can know his blue-eyed wife or partner has cheated on him if their child has brown eyes. "Blue-eyed men may have unconsciously learned to value a...