Thank goodness, he's sucking on candy. "Strange, you know? I'm not upset at this. Look, it's complicated."

He knows that he won't have a filter for long and really doesn't want to explain, what he means by 'other faces'. He is fine. Even if that's not the truth but a lie he tells himself, sometimes, like, now.

Even if someone is an alien, there is still that fear of rejection. Something that The Doctor has had by some of his companions. What if he gets in knee-deep and starts bringing up 'other face', and they find that weird and decide to go?

That War Doctor does not exist. He does not exist.