I wondered quietly where the phrase “a baker’s dozen” originated. Like, was the extra donut for the baker? Did the baker have twelve co-bakers, or baker minions, or whatever a baker’s helper might be called?
Or maybe it’s like this – you have this old fashioned donut recipe, right? And the donut recipe is supposed to yield 12 donuts. But then after you make them, there’s all these scraps left over, and you mush them altogether, and that’s the one you get to eat.