Sleeping is pretty creepy

"All things considered, sleeping is pretty creepy. For a third of your life, you're just not there, floating in this suspended state, everything slowed down. Except, at points, your brain is more active than when you're awake, making your eyelids all twitchy, and it's consolidating memories from the day and solving problems for you. Except when it's dreaming, when it's making no sense. And then you sometimes walk or talk in your sleep. Or drool. And then there's those mysterious penile or clitoral erections that occur intermittently during the night. Weird. What's going on here?"