Polyandry families in Tibet

Nowadays, most Tibetan marriages are monogamous with familiar 'nuclear' families. However, polyandry families in Tibet were common in ancient times. Even today, there are polyandry families in some rural areas of Tibet. Polyandry is a form of polygamy whereby a woman has several husbands. In Tibet those husbands are often brothers, which is why it is most commonly called "Fraternal Polyandry".

The mechanics of fraternal polyandry are simple. Two, three, four, or more brothers jointly take a wife, who leaves her home to come and live with them. Traditionally, marriage was arranged by parents, with children, particularly females, having little or no say. This is changing somewhat nowadays, but it is still unusual for children to marry without their parents' consent. Marriage ceremonies vary by income and region and range from all the brothers sitting together as grooms to only the eldest one formally doing so. The age of the brothers plays an important role in determining this: very young brothers almost never participate in actual marriage ceremonies' although they typically join the marriage when they reach their midteens.
Read more at http://www.tibettravel.org/tibetan-people/polyandry-in-tibet.html