Yea there are web pages that explain the La Volts hold, but refer to the "Busk" which I would have called a "Bustle" - (the scaffolding holding the skirt out at the back) the Busk holds the dress out at the front and is part of the corset structure. So the dance is not "lewd" per se, but can be the victim of "spin" (pun wasn't intended - but I'll take it).