He had been playing music like this for four years, and that was the first time he ever felt it, down to his bones (or, the one where they're musicians and Jim and Spock still kind of hate each other).

Spock met Jim when he was 7 and Jim was 6. It has since been generally agreed that this was a mistake (or: the one where they grow up together and things are simultaneously better and worse for it).

Sometimes the other Vulcans wonder how Spock managed to obtain such an exotic bondmate, and sometimes Spock wonders himself.