"Protocols?" Kirk echoed, looking caught in between shock and confusion as if his face is unsure of which expression to settle on. He'd seen hints of emotion in Spock before-- anger in this one and other things in his much older counterpart from another timeline that he'd met on Delta Vega-- but this was...new. Spock looked happy and he was asking about Christmas of all things.

Though part of him suspected it was probably on behalf of his human mother, he asked, "Why do you want to know?"