J.r. Ward said this quote

After a moment, Wrath turned to John. This is Lassiter, the fallen angel. One of the last times he was here on earth, there was a plague in central Europe-Okay, that was so not my fault--which wiped out two-thirds of the human population.I'd like to remind you that you don't like humans.They smell bad when they're dead.All you mortal types do.