Watching people go through the motions is one thing, but doing it yourself because your have to is another. Do humans cope by becoming numb to the filth accumulating on and inside of them?

[ Seriously. Seraphim are capable of eating, tasting, sleeping, and whatnot, but it would be through volition and not necessity. In other words, a luxury, of sorts, done mostly to make humans not feel as strange in their company. ]