I used to like what I think ware called logic puzzles, where you are given a grid and some key facts and have to rule out and rule in combinations to find out who did what with whom. Having a baby is like that too. You have some facts and some possible answers and have to go from there. For example, the baby liked weetabix and apple yesterday but today only likes porridge and clementine. What will she like tomorrow? The answer of course is banana. Why? Because nothing about babies is logical, stupid.
I always thought such puzzles were just a way to keep teenagers quiet on flights. I never realised they were really a way of socialising us so we'd be ready for parenthood. If I had I would have tried to complete them, rather than throw them away in a fit of pique whenever I got something wrong.