Headcanon: Bones complains about technology a lot but when it comes down to it, Jim is the one who will send out a handwritten letter.The first time Bones sees Jim reading over a letter with a pen between his lips, he teases him. Jim explained that he writes letters because if he can’t physically touch a person, he can at least give them something he did. 

Bones gets a letter the first time they’re away from each other for more than a week. When he opens it and begins to read he suddenly understands. He can’t touch Jim, not for another three weeks, but here is something that Jim put just as much thought, care and love into as any of the touches they’d shared.

Jim gets his first letter from Bones three days later.