How common is polygamy in Australia? And how does it work? Although it’s outlawed, polygamy is still practiced informally in Australia. Having more than one spouse is a long-standing and legitimate cultural norm in some Indigenous Australian, African and religious communities. This week Insight speaks to people from diverse backgrounds about life in a polygamous relationship and the benefits and challenges of sharing a spouse. What it’s like for children growing up in those households? How do spouses negotiate jealousy? And why is polygamy against the law?