Spock... he answered in his head, his mouth full of the Vulcan's cock. Fingers at his ears and neck, gentle touches quietly urging him on in that way that Spock had, making him feel like he was still following instructions, despite being the more active participant in this.

Letting go of Kirk's hand, he reached around him and opened the drawer of the nighttable next to the bed and reached for the lube. Pressing his mouth on Kirk's shoulder long enough to give him a little bite, he moved back to Spock and took his cock in his mouth once more, this time his slick fingers exploring further between his legs.

One finger circled Spock's entrance, and with a deep breath, looking up at Spock waiting for him to tell him to stop, Bones nudged the fingertip inside.