What. Okay, no, I have a complaint.
Tieflings breast milk doesn't taste spicy and like cinnamon rolls. Like this ain't even me baulking at the idea that different forgotten realms kith get to have differently flavored breast milk. That's the premise: I can buy into near any premise long enough to write 200 words about how wrogn the execution of the idea is.
So, of all the core kith in the Forgotten realms, Tieflings are one of the most diverse, sporting 10 different variants (Elves have 14, Humans have a rather undeserved 11 (tho discounting variants outside the FO, they drop to 4 and 0 respectively), and tied with dragonborn).
And given the nature of the teifling variants is whole-ass who the origin of fiendish blood is, which conveys a difference betwixt variants large-enough to in my opin make them seporate kith by a standard definition, with Tiefling being an umbrella term for these different disperate Kiths designed by the writers to convey a shared political reality of unfair and prejudical treatment steming from the fiendish origin these people had no say in choosing and aren't in anyway affluenced by. SURELY, this is a group which would, lineage depending, sport more than one flavor of breast milk.
Like, I can buy Asmodael Teiflings have cinnimon flavor'd breast milk. That's whatever. But at the very, at the very least, Levistean teiflings' breast milk ought to have cool minty undertones and aftertastes like a shamrock shake.