Key word, "exclusive"? Perhaps the evolutionary play is have a few kids in your teens then align yourself with powerful men to keep them well fed and, as a bonus, increase the fitness of your clan by improving solidarity?
I've never seen a compelling evolutionary explanation for exclusive homosexuality, which is puzzling, given that sexual orientation is moderately heritable.
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Interesting idea, but what's in it, evolutionarily, for the powerful men?
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Are there any somewhat reasonable/recent/undergrad-reading-level articles on this topic? I'm teaching Psychology of Reproduction next semester & *know* I'll get this question.
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Yes, here is a recent and very accessible summary of the topic: https://link.springer.com/referenceworkentry/10.1007%2F978-3-319-16999-6_3403-1 … David Buss also has a section on it in his Evolutionary Psychology textbook.
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Isn't male homosexuality more common in second sons from the same mother? Maybe it's a mechanism to reduce sexual competition as the population increases.
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I think that's a myth.
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Ive pondered this just as a thinking exercise and something I thought about is it could be natures way of ending bad genetic lines. That's really the only thing I can think of that makes sense. If not maybe it could have to do with some hormonal imbalance during pregnancy.
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The problem is that all things are moderately heritable. Even if homosexuality was purely cultural, you would still see some genetic correlations.
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