Marriage
Temporary marriages

Several cultures have practised temporary and conditional marriages. Examples include the Celtic practice of handfasting and fixed-term marriages in the Muslim community. Pre-Islamic Arabs practiced a form of temporary marriage that carries on today in the practice of Nikah mut'ah, a fixed-term marriage contract. The Islamic prophet Muhammad sanctioned a temporary marriage – sigheh in Iran and muta'a in Iraq – which can provide a legitimizing cover for sex workers. The same forms of temporary marriage have been used in Egypt, Lebanon and Iran to make the donation of a human ova legal for in vitro fertilisation; a woman cannot, however, use this kind of marriage to obtain a sperm donation. Muslim controversies related to Nikah Mut'ah have resulted in the practice being confined mostly to Shi'ite communities. The matrilineal Mosuo of China practice what they call "walking marriage".
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