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Peter Dazeley/Getty Images The 3 Most Common Reasons Open Relationships Fail
Plenty of couples try something new, learn what it costs, then pick the version of commitment they can actually live with.
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Photo: Olga Rolenko / Getty Images -
Photo: HollenderX2 / Getty Images Where Do Humans Fall on the Mammal ‘Monogamy Scale’?
Seals can’t be tamed.
