I know you were wondering about the part 2, right?
I just read the book City of Light, about Buffalo, NY at the turn of the century. It mentions wet nurses, and that got me thinking. Wet nurses must have gone out of style due to the burgeoning formula industry and the rise of the middle class (which meant less households employed servants). But now that breastmilk is back in style, so to speak, and pumping has become relatively commonplace, it seems like wet nurses could make a resurgence.
Now, since I'm talking about the purchase of bodily fluids for feeding infants, I don't think it would ever be quite an FDA-approved industry. However, after sitting in at my first-ever brestfeeding drop-in class yesterday, I could see how there could arise small, local black-market enterprises. Some women need more milk, and some produce too much. I imagine the covert exchange of Lansinoh bags, bartered for babysitting time, in the aisles of Babies R Us and at local coffeeshops.
I was kidding about the bartering. It's more likely women would give it away for free. Kind of like blood donation - if someone demands payment for it, you probably don't want what they're selling. Of course, then maybe lazy, selfish women would try to get in on the deal, figuring "Why be the cow when you can get the milk for free?"