I think you have put your finger on a key aspect with the coldness requirement.
When ice cream is melted or coke is lukewarm, they both taste far too sweet. I’ve long had a hypothesis that we evolved some kind of rejection of foods that taste too sweet (at least in large quantity) and that by cooling them down, they taste less sweet (overcoming that rejection mechanism) but we still get increased reward when the sugar content enters our bloodstream. I feel that carbonation is similar (flat coke tastes too sweet), so that the cold and carbonation could be hacks we’ve discovered to get around the ‘tastes too sweet’ defence mechanism, while still enjoying extremely high blood sugar based rewards. (Other forms of bitterness or saltiness added to the sweet foods could be similar.)
More speculative and still requires a few sentences to explain though, so a different example may be best.
It could just be attention. If something would otherwise be too sweet, but some other part of it is salient (coldness, carbonization, bitterness, saltiness), those other parts will take some of your attention away from its sweetness, and it’ll seem less sweet.
Why might humans evolve a rejection of things that taste to sweet? What fitness reducing thing does “eating oversweet things” correlate with? Or is it a spandrel of something else?
I think you have put your finger on a key aspect with the coldness requirement.
When ice cream is melted or coke is lukewarm, they both taste far too sweet. I’ve long had a hypothesis that we evolved some kind of rejection of foods that taste too sweet (at least in large quantity) and that by cooling them down, they taste less sweet (overcoming that rejection mechanism) but we still get increased reward when the sugar content enters our bloodstream. I feel that carbonation is similar (flat coke tastes too sweet), so that the cold and carbonation could be hacks we’ve discovered to get around the ‘tastes too sweet’ defence mechanism, while still enjoying extremely high blood sugar based rewards. (Other forms of bitterness or saltiness added to the sweet foods could be similar.)
More speculative and still requires a few sentences to explain though, so a different example may be best.
If this is true, it’s fascinating, because it suggest that our preference for cold and carbonation are a kind of specification gaming!
It could just be attention. If something would otherwise be too sweet, but some other part of it is salient (coldness, carbonization, bitterness, saltiness), those other parts will take some of your attention away from its sweetness, and it’ll seem less sweet.
Why might humans evolve a rejection of things that taste to sweet? What fitness reducing thing does “eating oversweet things” correlate with? Or is it a spandrel of something else?