Group marriage in SF
Group marriages, poly/nonmonogamous, sexuality separated from childrearing, etc.
- Francesca Lia Block, Dangerous Angels: The Weetzie Bat Books (1998). This collects five short novels in one book. Weetzie Bat (1989) - Witch Baby (1991) - Cherokee Bat and the Goat Guys (1992) - Missing Angel Juan (1993) - Baby Be-Bop (1995)
- Camarin Grae. Stranded (In the protagonist's home world, 3-way relationships exist and are respected, although it is acknowledged that they can be difficult. On Earth, 3 of the characters in this novel decide to attempt such a thing also.)
- Group marriage
- Gail Dayton's The Compass Rose
- Candas Jane Dorsey. Black Wine
- Diane Duane's Tale of the Five series (also called the Middle Kingdoms sequence)
- The Door Into Fire (1979)
- The Door Into Shadow (1984)
- The Door Into Sunset (1992)
- The Door Into Starlight (proposed)
- Robert A. Heinlein's Friday and others. Heinlein mastered the art of coming up with reasons and social forms for women to get it on with each other and men, but for men to stay largely manly and heterosexual.
- Ursula K. Le Guin's "Mountain Ways" and "Unchosen Love" -- stories that take place on the Planet O, in the Ekumen universe