Jim hums his understanding, speechless for a while against the tight squeeze of Bones' body around his fingers. He's burning hot inside, and as Jim's fingers scissor, he wonders at his own control, so desperate already to be inside of him.

"I never - " he says, panting into Bones' mouth, "I've never bottomed. Been saving it for somebody special." Free hand tangling in Bones' hair, Jim pulls his head back for an openmouthed kiss. "Maybe you can help me out with - " Bones' body clamps hard around his fingers, and Jim groans. "Mmm. With that someday."