All About That Bass--I mean Butt/Ass

"Like a round, shiny mirror, Kardashian’s butt reflects back to us our myriad cultural panics and anxieties"

It seems Salon is harkening back to an earlier trope whereby rounded mirrors did indeed reflect our worst sides:

From Bosch's Garden of Earthly Delights

Many more instances can be found in German renaissance prints.

I'm afraid I can't remember the printers' names and "demon ass mirror" simply doesn't work well in search engines.