This page provides a listing of movies with a polyamorous theme.

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Anecdotally, research shows that children can do well in poly families—as long as they're in a stable home with loving parents, says Elisabeth Sheff, a sociologist at Georgia State University, who is conducting the first large-scale study of children of poly parents, which has been ongoing for a decade.

But because academia is only beginning to study the phenomenon—Sheff's study is too recent to have drawn conclusions about the children's well-being over time—there is little data to support that notion in court.

But there is one policy issue rousing concern: legal precedents concerning their ability to parent.

Custody battles among poly parents are not uncommon; the most public of them was a 1999 case in which a 22-year-old Tennessee woman lost rights to parent her daughter after outing herself on an MTV documentary.

But they are beginning to show up on the radar screen of the religious right, some of whose leaders have publicly condemned polyamory as one of a host of deviant behaviors sure to become normalized if gay marriage wins federal sanction.

"This group is really rising up from the underground, emboldened by the success of the gay-marriage movement," says Glenn Stanton, the director of family studies for Focus on the Family, an evangelical Christian group.

Everyone in this group is heterosexual, and they insist they never sleep with more than one person at a time.

Keep up with this story and more It's enough to make any monogamist's head spin. Researchers are just beginning to study the phenomenon, but the few who do estimate that openly polyamorous families in the United States number more than half a million, with thriving contingents in nearly every major city.

"But finally, with the Internet, the thing has really come about." With polyamorists' higher profile has come some growing pains.

The majority of them don't seem particularly interested in pressing a political agenda; the joke in the community is that the complexities of their relationships leave little time for activism.

But they do believe in "ethical nonmonogamy," or engaging in loving, intimate relationships with more than one person—based upon the knowledge and consent of everyone involved.