melanogaster that alter social partner age generally find a negative trend between social partners' age and longevity, i.e. young same-sex partners are beneficial but older partners deleterious to lifespan [ 106 , 109 , 110 , 117 ].
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melanogaster that alter social partner age generally find a negative trend between social partners' age and longevity, i.e. young same-sex partners are beneficial but older partners deleterious to lifespan [ 106 , 109 , 110 , 117 ].