Surely You Gest

Spock is aware that language is far more than the phrases we say and the pieces we break them down into. It's a well-known fact that gesture and body language predate speaking and writing as a form of communication in every single culture in the known galaxy. Perhaps that's why his teaching assistant's sign language affects him so deeply. What it is socially acceptable for one's hands to do is very strictly limited on Vulcan due to their... significance, and he is terribly certain that none of the gestures Mr. Kirk makes with his, acceptable as they may be here on Earth, fall within that range.