There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
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Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
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The human brain is more active during sleep than during the day.
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Sleeping on the job is acceptable in Japan. It is viewed as exhaustion from working hard. Some people fake it to look committed to their job.
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People who sleep late have more mental stamina and can outperform early risers.
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