Hmmm… Here’s my reasoning: I assume supermarkets would sell oranges, grapefruits, lemons, limes, mandarines. Pomeloes and tangerines would be a pretty rare find.
It’s not a grapefruit, which is more bitter than sweet, nor lemons or limes, which are too sour to drink straight, nor mandarines or tangerines, since those are too small.
I dunno but I am in the US and it isn’t one of those fruits you said. Haven’t been to the grocery store recently though. I would consider this a common fruit though, at least where I am.
Indeed, it’s not merely people but characters in general. Gods have been asked before, and also characters from fiction. I did try to stay on topic for that one (while making it interesting at the same time).