I read somewhere that pigeons normally live in little holes in cliffs, and that their “nests” are basically only supposed to prevent the egg from rolling out. So they are doing perfectly fine in their own way. In contrast to you and your stupid experiment.
But is the sugar of broken down (caramelized) onions the same sugar? As in, would the jar with sugar next to my meal to show me how much sugar I’m eating fill up as the onions caramelize?