Is there a Correct way to Sleep?

Another twitter debate! Sleeping positions. A chart was posted with 18 different sleep positions. Now there is a whole debate on how people sleep. There are way more than 18 ways to rest. The biggest gripes are over position #13. Who sleeps like that? But really do we know how other people sleep? Take a look for yourself. https://pbs.twimg.com/media/EOsdgw1U8AAmYUo?format=jpg&name=medium