Two other things crossed my mind. First, with the sound off, the performance looks like something from a low-budget Roger Corman teen sexploitation film. Something that would be called "The Devil's Prom Night" or "Demons Within." Beyonce's "dance" is utterly artless. It's the Reefer Madness of sexuality.
Second, back when I was dating, any woman who dressed or behaved within three standard deviations* of this would have instantly been labeled as desperate and for good reason. I would suggest that things haven't changed. When I read about the hook-up culture, the amount of porn being consumed, the number of babies born to single women, it sure looks to me like all kinds of women are desperate.
Oh well, it's probably just part of social conservatives' War on Women. Just to be safe, let's bankrupt the Little Sisters of the Poor in support of free IUDs. That should fix things.
* - I'm sure Beyonce's deviations are not standard. They probably involve power tools, vats of industrial lubricants, live scorpions and dead marsupials.