You start spending time together, and everyone starts asking if you're a couple. You become a couple and everyone starts asking when you're getting married. You get married and everyone starts asking when you're having a baby.
I have a sneaking suspicion we do silly things like playing pretend that Heber, Utah is the North Pole as much for ourselves as we do for the kids. Because kids are magical creatures. (If you look past all of the tantrums and the poop.) They carry it in spades. (Both magic and poop.) And I can't help but to think at least part of the reason we humans keep bringing them into the world is because we need magic in our lives. We just do.