This article is from the Polyamory FAQ, by h-wilper@uiuc.edu (H. Wilper) with numerous contributions by others.
Joan Armatrading, "The Weakness in Me"
Baba Yaga, "Monogamy Shpedogamy"
Barenaked Ladies, "Alternative Girlfriend"
William Bell, "Trying to Love Two"
Christopher Bingham, "Family"
Chris de Burgh, "More Than This"
Patsy Cline, "Triangle"
Leonard Cohen, "The Sisters of Mercy"
David Crosby, Jefferson Airplane, "Triad"
Devo, "Happy Guy"
Jane's Addiction, "Three Days"
Howard Jones, "Noone is to Blame"
King Crimson, "Man With an Open Heart"
Christine Lavin, "Don't Ever Call Your Sweetheart By His Name"
Lovin Spoonful, "Did You Ever Have to Make Up Your Mind"
Deidre McCalla, "Don't Doubt It"
Mary MacGregor, "Torn Between Two Lovers"
Joni Mitchell, "Cactus Tree"
Joni Mitchell, "Coyote"
Mondo Vita, "Four Way Stop"
The Monks, "Love in Stereo"
The Muppets, "We Got Us"
Michael Nesmith, "Different Drum"
Prince, Cyndi Lauper, "When U Were Mine"
Resless Heart, "Why Does It Have to Be"
The Roches, "You're the Two"
Scarlett, "Independent Love Song"
Sting, "Tea in the Sahara"
 
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