Changes

*'''polyandry''' (the practice of one woman having multiple husbands);

*'''polyandry''' (the practice of one woman having multiple husbands);

*'''[[group marriage]]''' (the practice of two or more men and two or more women sharing husbands and wives, also known by the slang term '''swinging'''); and

*'''[[group marriage]]''' (the practice of two or more men and two or more women sharing husbands and wives, also known by the slang term '''swinging'''); and

*'''[[open marriage]] (the practice of a married couple who agree to allow one of them, or both, to bring additional sexual partners into the relationship; the partners can be either heterosexual, homosexual, or bisexual).

*'''[[open marriage]]''' (the practice of a married couple who agree to allow one of them, or both, to bring additional sexual partners into the relationship; the partners can be either heterosexual, homosexual, or bisexual).

In modern times, opponents of [[same-sex marriage|same-sex "marriage"]] worry that if legalized it would be a step down the slippery slope to polygamy. Recent events to support this claim includes the [[Netherlands]] in 2005 four years after introducing same-sex 'marriage' gave three-people relationships legal recognition through a "[[cohabitation]] agreement". Stanley Kurtz wrote:

In modern times, opponents of [[same-sex marriage|same-sex "marriage"]] worry that if legalized it would be a step down the slippery slope to polygamy. Recent events to support this claim includes the [[Netherlands]] in 2005 four years after introducing same-sex 'marriage' gave three-people relationships legal recognition through a "[[cohabitation]] agreement". Stanley Kurtz wrote: