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and, a year later, share an apartment. He is easy to get along with and seems to only have one core belief about himself/us: he does not believe in monogamy. Never has, never will. Yet, he says, he will tell you immediately if he ever has sex with another man. He often reminds you of this belief: on
Introduction Mating behaviors can vary considerably among individuals, populations, and species and have both short and long-term fitness implications ( Clutton-Brock & Harvey, 1978 ; Griffith, Owens, & Thuman, 2002 ; Westneat & Stewart, 2003 ). Monogamy was traditionally assumed to be the