I can one up that one - While my wife and I were walking the local yearly arts & crafts festival we saw a woman holding her, what appeared to be, 3-4 year old, parallel to the ground while he was nursing on a fully visible boob via an untucked shirt. She was just walking around like nothing everyone nursed a child the size/age of her's. Not pretty.
Nothing against nature's way, just be courteous about it. And, when the kid starts to talk in complete sentences, it just may be time to quit.
-Kindergarten years-
Teacher: "Johnny, where's lunch?"
Johnny: "My Mom hasn't arrived yet."
take it from there...
Anyways, didn't we...well...not really me...go through a diaperless era already? I remember studying about the '60s back in high school...
-pat