Okay but - imagine Bones calling Jaylah sweetheart.
He’d try to take it back instantly, because he still flinches whenever he remembers the one (and only) time he called Uhura that. And he doesn’t want to be condescending, not at all - he’s a southern gentleman, dammit, and these terms of endearment just slip out sometimes.
But Jaylah stops him mid-apology, and goes “explain to me this word, Leonard Bones.”
He does - and from then on, not only does she insist he calls her sweetheart - she calls him that as well.
CANON.
(Source: chrisfine)