We didn't even ask for the girls in the first place. We just said "pay the ransom with horses if you don't have gold" and they sent us servant girls.
I think it has something to do with their strange cavalry. I try not to think about it too much.
Most of the damage that BoM inflicts is sanity damage. 
Horses are a fine meal. Don't know why you waste it for riding into a fight when standing on a man or badger will work so much better.
