Upsides: Clean teeth, gentle humming in your head, scrubbing feeling across tongue is a gentle stimulant
Downsides: Every time you speak and a wave of skittering & aggressive insects spills out, you get to have the “Back, you unearthly horror! BACK!” conversation all over again.
Okay, okay, quick check: Everyone here who HASN’T given over some part of their hate-fueled corporeal form to the housing of horrors in exchange for power, raise your hand.