Quoting KNZ.:" Well, sure, but i don't think that means you call all the women in the village, "mom". I think i'd ... [snip!] ... i'd rather have my child lose a good friend if she was to move away or something was to happen, than to lose their "mom". "
Yeah...I have "aunts" who are just my mom's best friends, and that pretty much covers it. They didn't help raise me, but even if they had I can't imagine calling them Mom.
That's a lot of parents. I don't think it would necessarily be a bad thing, but it could cause some confusion. Then again, there are all different kinds of families and if the kid's getting what it needs out of life, lots of love and support, then there's no problem.
It's just that parenting is a massive commitment, so names like Mom and Dad shouldn't just be thrown around to the first people they stick to, and that new Mom or Dad should acquire legal parenting rights to the kid.