So yes, she is dusting her ass. I'm a little worried that maybe this is something I'm supposed to be doing...kind of like that awful realization in 10th grade that I was the only girl who wasn't plucking her eyebrows. I'd never noticed them! I didn't know!
So maybe one is supposed to dust your ass now. I could do that...just as long as my duster always matched my bra and panties so nicely.