Can't post due to multiple a/c's original a/c is banned.....
India: Brothers share wife to secure family land
From WikiPedia
Polygyny
Polygyny is the situation in which one man is either married to or involved in sexual relationships with a number of different women at one time. This is the most common form of polygamy. This was the most common form of polygamy practiced by Mormons in the 19th century, and practiced today by self-identified fundamentalist offshoots.
Polyandry
Polyandry is a practice where a woman is married to more than one man at the same time. Fraternal polyandry was traditionally practiced among nomadic Tibetans in Nepal and parts of China, in which two or more brothers share the same wife, with her having equal sexual access to them. Polyandry is believed to be more likely in societies with scarce environmental resources, as it is believed to limit human population growth and enhance child survival. A woman can only have so many children in her lifetime, no matter how many husbands she has. On the other hand, a child with many "fathers", all of whom provide resources, is more likely to survive. (In contrast, the number of children would be increased if polygamy were practiced, and a man had more than one wife. These wives could be simultaneously pregnant). It is a rare form of marriage that exists not only among poor families, but also within the elite.