As soon as we wake up, we immediately wish we were back asleep. We crave it and long for it throughout the day. We buy soft pajamas, special blankets, and agonize over how soft or firm our pillow is. When it comes down to it, we should spend a little over a third of the day asleep. In fact, most scientific studies recommend adults 18 and older get at least 7 hours of sleep per night. Despite being a basic human necessity, like water, breathing, and food, we just can’t seem to get enough of it.