Who needs sleep? Everyone

Have you ever wondered why we need 6-8 hours of sleep in a night? How much easier would life be if we only had to sleep four hours to feel completely rested? I would be able to get more homework done, my apartment would be vacumed all of the time, I could spend more time with Anthony, and I wouldn't be yawning at work. What a life...alas, it is not to be.