Kunzite never blushes, and Zoisite finds that absolutely infuriating. It doesn’t matter what he says or what portion of the body he touches. Even when aroused, Kunzite is perfectly composed.
Zoisite always blushes. When Kunzite licks his ear unexpectedly, when Kunzite whispers to him with that voice that could mend the world and make mountains crumble, when Kunzite kisses him in front of people. He blushes when there’s no real reason to blush, and he hates it.
But the worst part of it all is when someone finally does make Kunzite blush and it isn’t and never could be him.