Genetic correlations could reflect vertical pleitropy. Also in those Zietsch et al studies, aren't the phenotypic (purely behavioral ones say) between sexuality and the mental outcome very small? So even if genetics is explaining all of those otherwise small phenotypic correlations. Not sure how strong evidence genetic correlations are against minority stress mechanisms (that is, do they really rule out purely "psychosocial" minority stress mechanisms since doesn't minority stress theory predict a genetic corelations anyways? Not dispositive evidence either way). Interesting debate though, thanks.
Three further discordant MZ studies of sexual orientation and mental health outcomes here:
https://www.cambridge.org/core/journals/psychological-medicine/article/minority-stressors-rumination-and-psychological-distress-in-monozygotic-twins-discordant-for-sexual-minority-status/DF3DD4762FF83D7B26C36AE325279020
https://ajph.aphapublications.org/doi/full/10.2105/AJPH.2016.303573
https://www.cambridge.org/core/journals/psychological-medicine/article/psychiatric-morbidity-associated-with-samesex-sexual-behaviour-influence-of-minority-stress-and-familial-factors/72656B3B344FE385B58B741CFA0DCD59
Also this sibling-control design study:
https://link.springer.com/article/10.1007/s10654-018-0411-y
Finally, these studies also rule out correlated genetic factors using causal modelling in twin cohorts, so a powerful design:
https://link.springer.com/article/10.1007/s10508-022-02455-9
https://link.springer.com/article/10.1007/s10519-022-10130-x
Genetic correlations could reflect vertical pleitropy. Also in those Zietsch et al studies, aren't the phenotypic (purely behavioral ones say) between sexuality and the mental outcome very small? So even if genetics is explaining all of those otherwise small phenotypic correlations. Not sure how strong evidence genetic correlations are against minority stress mechanisms (that is, do they really rule out purely "psychosocial" minority stress mechanisms since doesn't minority stress theory predict a genetic corelations anyways? Not dispositive evidence either way). Interesting debate though, thanks.