Sarcasm is an adjusted stress reaction.

Which is good, because the whole "universe creates the perfect companion for the Doctor" theory is kind of creepy to me, and it's not a coincidence that it seems particularly popular among those who also believe the Doctor is now and always has been asexual and celibate, picked up Susan from a cabbage patch somewhere, and would never, ever suffer the touch of something as detestable and gross as a woman.

Wait there are people who like that idea for reasons other than "It's interestingly creepy"? (I like a lot of creepy, disturbing, and wrong things in stories when it feels like they're meant to be that way, so I have a lot of episodes of confusion where I'm all "Wait, you weren't aiming for disturbing with that?" moments with ideas fandom kicks around. And while I think "The universe makes the Doctor an ideal companion" idea would make for intriguing dark!fic, I don't think I'd like it canon.)