>>211775884
Not nearly as surface level supportive and affectionate as you probably think. The overwhelming majority of sibling relationships have a significant adversarial nature.
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>>211775981 I'm pretty sure there's some sort of genetic or psychological component adjacent to the Westermarck effect that makes it to where the innocuous behavior of your siblings drives you up a fucking wall even though the same exact behavior from a classmate or neighbor wouldn't engender the same response.