Granted there's a fair amount of beauty/health/vanity reasons for eating it and that's the primary reason for munching on these poo-marinated clots, but I believe there is a small amount of unconscious Babby-Worship associated with it.
In Babby-Worship, I mean the whole clot being some nonsensical apex of purity and speculness because it made the loaf grow, and you know that crotch nuggets are all 'pure and spechul' to their moos - so their twisted logic somehow believing that eating this clot is going to endow them with some of this pureness and speculness as well as majikal babby health and beauty powers
eyes2.
Either way it's nothing more bizarre familial cannibalism (the placenta is made out of the same material as their loafs - so it is actually eating a part of their loaves) with a bit of corpophilia thrown in too -
::brbl.