Lily: Marshall, if we were at home with a baby tonight, we never would've seen Ted's doppelganger. Imagine missing that. How would that feel?
Marshall: I would blame that child for the rest of his life.
Lily: Exactly. For the rest of her life.
Marshall: Okay, you're right. There's no hurry.
Lily: Okay, how about this? We agree there's no sense in having a baby until we've seen all five doppelgangers, right?
Marshall: Of course. Stands to reason.
Lily: Okay, so, when we finally see Barney's doppelganger, that's the universe telling us it's go time, and that's when we'll start trying. Deal?
Marshall: Deal.