The Doctor hunched his shoulders a little more. "How long've you been traveling with me? Or, your Doctor."
Oh, yes, there it was again, the guilt creeping up on him, ready to crash over his head like a wave, and leave him swamped. He knew this wasn't the best idea, asking about this male version of Rose's travels with the Doctor, but he stubbornly refused to listen to the part of himself that knew that.