Polyfidelity

Polyfidelity (also sometimes called polyexclusivity) is a form of polyamory where all members are considered equal partners and agree to be sexually active only with other members of the group. The term originated in the Kerista Village commune in San Francisco which practiced polyfidelity from 1971 to 1991. The community expected all of its members, within bounds of gender and sexual orientation, to be sexually active with all other members, and for exclusive relationships not to be formed. However, this aspect of polyfidelity is not always expected today.