The Secret Language of Sleep

I came across this site from an article on the Monkey Bites Wired Blog. It's for a new book called The Secret Language of Sleep and talks about sleeping positions for couples based on their personality traits. There is even a sleep test (http://www.evany.com/sleeptest/index.htm) to help you find a suitable one. This is the one that it recommends for me:

Find your own pose!

Since the test is gender neutral, but this picture is not, the question I keep asking myself is, "Am I suposed to be the seatbelt or the passenger?"