Oh great idea! Gears turning....

I think Caster's Keep was originally a North of the Wall brothel setup for the sole purpose of harvesting babies - then "moral rules" were introduced in a change of the Night's Watch oath to keep the guys out of there- thus Craster himself was brought in and became WW pimp daddy himself - over generatons there have been several Craster's I'd suppose - he might be giants blood, easily controlled by mind warg- but surely some of those 'daughters' of his are not his own -- maybe Benjen fathered a child -- Gilly's book child Monster who was sacrificed as she has Mance's child with her now-Aemon Steelsong -- I guess in the show Benjen could have fathered Gilly's child now named Samwell (SEE THIS GREAT THREAD ABOUT NIGHT'S KING INFLUENCE ON NW OATH).

https://www.reddit.com/r/asoiaf/comments/44r805/spoilers_extended_nights_kings_influence_on_the/

Maybe male baby's born North of the Wall of the Andal bloodline have genetic predisposition towards expression of specific traits, based on the cold climate and bloodline -- could Craster himself be of Andal blood and not of First Men blood? That would mean he is not giant simpleton blood. And because it is so cold and moreso that they are dead, The Other's can't reproduce- I'm just not sure if they are using the babies as sacrifice or not, or to re-populate their numbers. I'd think that the Others are using the Children of the Forest, those remaining, to feed on for their life force, an this is why they are migrating South towards Dorne-a better feeding ground where the Orphans of Greenblood are located. Would the brothel, if setup in the South produce fire dragon oriented children? Does Dorne have a NO-BROTHEL policy? That would make a lot of sense.

Crackpotty for sure, but do you see where I am going with this idea? IceDragonBabies! in the North (I think the Others are the hybrid God on Planetos of dragons and mankind, maybe a reverse in that dragons were turned into men -- and greyscale was just a failed attempt to get there, or if you brought the stonemen to the far north they would turn into WW's. -but I dunno. This is fun to think about!

So again, if the Others move South where will they get their sacrificial babies? Is there a Craster's keep in the South? Probably not yet. Also, what would the children look like? Maybe because of the hotter climate they would create females-ish Crasterkids to mate with the Northern male Crasterkids and then have some sort of new freakishly sort of monster? .. HAHA .. It would be the total apocalypse in the story -- OMG I want this to happen in the story just to see what the outcome is -- perhaps like one of the extinct families from the North who I figured was used as bait to draw the Othrs past the Wall another family- THE FREY'S!! is used as bait to draw the Others South past th Neck, then Bran breaks the Neck (or a new Wall is put up) to create Northeros, isolating the Others in the South. That would be a more good karma live and let live approach instead of just killing all the Others. meh .. LOL

I'm non-apologetic about it but hard core beancounter fans hate these kinds of discussions because they are too inside the box and there is no empiral evidence found in the book to directly support the notion -- but there is in truth when you look at the larger parallel analogy storylines of things the text in the book tell the reader-- beancounter types just can't seem to open their mind and go there. But oh well-- I'm more of a Free Folk in thinking myself and I wish that weren't held against my posts votes. I am glad that the MODS of this forum are open minded enough to permit these kinds of posts. Outside the box is the only way new theories are supported or dismissed -- and I now see obviously that some past theories are way off as they limited the conditions of proof to exact text interpretations in the book without following the approach that most things are analogous to either past, present or future events and people. The whole Jon Snow situation is most likely already stated in the books and proven, it's just no one has sifted it out yet-- the biggest mysteries have the hardest clues and require the most advanced decyphering methods.