I highly doubt most girls understand the implications of dancing in that manner. They are mirroring what they are allowed to view. That said, it should be curbed by a loving adult if it is seen, IMHO, by redirection or however to get the message that there are better ways to move.
My dd is 9 and she's pretty bad at dancing
so she mostly spins in circles or waltzes all silly around the room with me, her dad, or brother. We have always danced in our home. They know how to load iTunes and dance around the house. They love it. (dd and ds) But I don't recall her ever dancing provacatively either. She has seen dance venues with trained adults where some of the dancing could have been viewed as suggestive and I just make a point to tell her that that is not an apropriate form of dance unless you are trained and performing for a show- and even then
. She gets my message that it's not okay for her.
We also do not allow her to watch Brittany or anyone like that. She's 9 not 17. And I treat her thusly. She also doesn't listen to that music either. I think lots of mainstream parents don't have those rules. Most of her homeschooled friends are raised similar to our views. She has a couple other friends whose families are sweet people but don't have the same values so we are careful about her time with those girls. Some of them are 9 and flat out boy hungry... it's digusting.
From my experience, having been a cheerleader when I was a pre-teen and teen... Looking back I am appalled at how we were allowed to dress, the music we were allowed to dance to, and HOW WE WERE ALLOWED to dance. My parents and coaches should have had their heads examined. Our skirts were so short we wore tightlike-undies and we danced around like little hookers for every game....and trust me the boys loved us and we loved that they did...I and my friends were pretty premiscuous and I think this lifestyle contributed to it greatly.
Having that background to draw upon definitely shapes how my dd is raised and with what perameters. I am probably tougher on her rules because of how much sexuality was infused in my pre-teen and teen years. I don't want her thinking with her body and reproductive organs. I want her thinking with her brain. And provocative dancing can definitely be an issue, even before a young girl knows what she is bringing on herself. It should be curtailed at any opportunity IMO.
150 years ago, touching a mans hand during dancing was risque, now girating sex acts while clothed is part of the norm.....we really need to draw a line somewhere and reintroduce modesty into little girls lives whenever we can.