Among Hindus there is a custom, when a couple contemplates marriage, for their family to take their horoscopes to a Brahmin. He may not see very much in the horoscopes, but he is generally a psychologist and he ponders over the question as to what category each person belongs in--whether it is angelic, human, animal, or still denser. If he finds that there is a vast difference between the categories, he will tell them it would not be right for them to marry.