Polyamorous dating rules
Some bigamy statutes are broad enough to potentially encompass polyamorous relationships involving cohabitation, even if none of the participants claim marriage to more than one partner.
In most countries, it is legal for three or more people to form and share a sexual relationship (subject sometimes to laws against homosexuality or adultery if two of the three are married).
Bigamy is the act of marrying one person while already being married to another, and is legally prohibited in most countries in which monogamy is the cultural norm.
By contrast, when asked about other relationships at the same time as a steady relationship, around 17% stated they had had other partners while in a steady relationship (50% no, 17% yes, 33% refused to answer).
While openly polyamorous relationships are relatively rare (Rubin, 1982), there are indications that private polyamorous arrangements within relationships are actually quite common.
Blumstein and Schwartz (1983, cited in Rubin & Adams, 1986) noted that of 3,574 married couples in their sample, 15–28% had an understanding that allows nonmonogamy under some circumstances.
The percentages are higher among cohabitating couples (28%), lesbian couples (29%) and gay male couples (65%) (p. On August 29, 2017, the Council on Biblical Manhood and Womanhood released a manifesto on human sexuality known as the "Nashville Statement".