[It's a good thing. It's a very good thing. It just means that he's sort of messing with the sun whenever they start to move their relationship forward, which makes it a little difficult for him to handle properly. He wouldn't have her act any other way though. It's something he needs to get used to, not that she needs to chance.]

I'm thinking really just this one, given the approximate levels of Time Lord population in various places throughout the universe.