IIRC grain is the reproduction of the plant. Women do the obvious work of giving birth, hence the link. There's your "coherent inner logic in the abstractions"

IIRC grain is the reproduction of the plant. Women do the obvious work of giving birth, hence the link. There's your "coherent inner logic in the abstractions" right there, it just isn't useful to HN readers except as a curiosity. We can't do anything with it.