How many hours do you sleep per day ?
Those days my sleeping period becomes shorter and shorter .Six hour or less per day . But I didn't feel sleepy.
I have no idea....... Because I usually sleep at least 8 hours or more and get a nap at noon.
Has my body something wrong ? ...... Maybe It's ok?
Nevertheless,I consider some of you sleep less than me , for some guys here often write or reply posts late in the night. (so late )
So robust that needn't long-hour sleep?
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