If you’re thinking about having a baby or you have one on the way, there are some things that experience hasn’t taught you yet. But it will. Oh, it will. Here are four things you’ll understand once your bundle of joy arrives. 1. How precious sleep is. Until you’re a mom, you never truly understand what a gift sleep is. Sleeping in is long gone, and napping when the baby naps is impossible. Getting six straight hours of sleep is a cause for celebration. 2. How fast you can eat.