In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
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The strangers in your dreams are actually people that you've seen in real life.
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Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
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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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You forget 90% of your dreams.
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If you hold farts in during the day, they'll just come out when you sleep.
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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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