Re: Hm...Intrigued By Nipples?
Bah, I just consider it a normal behavior, part of the whole 'nursing thing'.
My kids scratch my side/back while nursing, too!
I think in part it's instinctive behavior, esp. with newborns. I've watched cats that were weaned too early in particular 'massage' things. I know it aids in letdown...I think when they get older they just get more coordinated and start exploring areas they already know. They don't know or understand how not having yourself really exposed would be a problem, they don't see anything shameful in any part of it.