Committed to marriage for the masses Polyamorists say they relate honestly to multiple partners Unitarians from Boston to Berkeley have opened another front in the liberal crusade to expand the definition of marriage and family in America. It's the new polygamy, and according to the Unitarian Universalists for Polyamory Awareness, their relationships are at least as ethical as other marriages -- gay or straight. "Polyamory is never having to say you've broken up,'' said Sally Amsbury of Oakland, whose sex and love life openly includes her husband and two "other significant others," known in polyamory parlance as "OSOs." Amsbury serves...