Obi-Wan turns his head to face her at the kiss, but she's already moving away. It's probably for the best, because it hadn't been surprise at the gesture that made him move. He's not sure what he would have done if she hadn't turned away; perhaps just shared a look with her. But being so close, he thinks his much-vaunted Jedi control wouldn't have held up, and he would have given her a real kiss. This is twice now that she's kissed his cheek, and he still can't figure out if she's merely being affectionate with a friend, or if her feelings might mirror his. And worse: he has no idea how to go about finding out.

At her question, Obi-Wan glances not at the bed, but the door and windows. "I don't mind either side, but if it's all right with you, I'll take the right." It's the one closer to the door, and even knowing that they're (theoretically) in no danger here, he knows he will sleep safer if he's between her and potential harm.