How many forms of marriage are there?

Several brothers and sisters married collectively, which was very popular in ancient times. The fact that women in ancient China were "aunts and uncles" among their in-laws after marriage is proof of the existence of this system. The existing Malay kinship system is also evidence.

The marriage of the Punaluan family:

Produced on the basis of consanguineous marriage. Some sisters are the same spouses of husbands, and some brothers are the same spouses of wives. It established the kinship system of Turan people and Kano people.

Husband and wife marriage:

A man and a woman form spouses in the form of marriage, but they do not exclude cohabitation with outsiders. Both parties can divorce or separate at will.

Polygamy:

A man marries many women as his wife at the same time. Although men in ancient China and the capitals of Central Asian countries could marry multiple women in the past, there were still differences between them. In traditional China, only one of his spouses is a wife, and the others are concubines; Nomadic Hebrews are simple wives. Polygamy in a narrow sense refers to the latter.

polyandry

A wife has multiple husbands at the same time, or multiple men marry a woman at the same time. This marriage pattern once existed among Tibetans.

Single even system or exclusive even system:

Marrying a single spouse and refusing to live with outsiders are the fundamental elements of this system. Modern civilized society generally adopts this kind of marriage system.

Same sex marriage:

There are different opinions on whether this form of marriage exists.

Walking marriage: a kind of marriage between Mosuo people, which is a relatively free way of marriage. There is no economic relationship between men and women, and it is not necessary.

Cohabitation is a marriage maintained solely by love.

Marriage exchange: for example, one brother and another brother and sister exchange marriages.