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War_Hymn t1_j8tkk77 wrote

I think it's a seasonal response telling you to fatten yourself before winter comes (or dry season if you're in the tropics). Most fruits mature around late summer/early autumn (or close to the end of the wet season in the tropics). So that's when you're going to be hit with a fructose rush, which tells your brain, "hey, tough times ahead, better go out and find food while you can!".