[It gets under his skin in a way he can't really explain, feeling much the same about the creepiness of it, so different from the words that they would speak among themselves. So yeah, it's not wrong, but- He can't quite look away anyway, even as Shiro's laughter manages to ease some of Keith's tension too.]
It's one way to insist. [Hrmph. He grumbles, though a little lighter, an honesty in the words that's so predictably Keith, how he just says it, quiet though it is.] Don't see what's so fun about making jabs at things we already know.