Marriage is a social union or legal contract between people called spouses that creates kinship.The definition of marriage varies according to different cultures, but is usually an institution in which interpersonal relationships, usually intimate and sexual, are acknowledged.
According to Royal Anthropological Institute 1951, p.111, it is a union between a man and a woman such that the children born to the woman are recognised as legitimate offsprings of both partners. All societies have their own kind of incest taboo, human behaviour with respect to mating with close relatives may express a generalised primate tendency.
In nonindustrial societies, a person's social environment includes kin and strangers. Strangers are potential or actual enemies. Marriage is one of the primary ways of converting strangers in to kin, of creating and maintaining personal and political alliances,relationships of affinities. Exogamy , the practice of seeking husband or wife outside one's own group, that has an adaptive value which links people into a wider social network that nurtures, helps and protects them in times of need. Endogamic rules are common in stratified societies.
Incest refers to sexual relations with someone considered to be a close relative.Types, risks and avoidance of incest also reflect specific kinship structures. A cultural focus on father-daughter incest may correlate with a patriarchal nuclear family structure as the cultural focus is on the avoidance of brother-sister incest in societies. For example, in India, where castes are the endogamous units. Castes are subdivided into exogamous descent groups. The same culture can have both endogamic and exogamy rules.
Same-sex marriage is said to be illegal in some countries as marriage establishes the legal parents of children. It gives spouses rights to the sexuality, labor and property of the other. It also establishes a socially significant relationship of affinity between spouses and each...