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Your Quiet Neighbor
Datum, that ayuss!!
Hooooooly shit! That moon fills the sky!
Love the little heart just at the top of the back of her panties.
I gotta admit that the sleep cycle diagram threw me off. Right now, only 5 sleep stages are distinguished for humans (awake, REM, N1, N2, N3).
That seems to be an arbitrary change made within the past 10 years. The graph here comes from the sample hypnogram on the wikipedia rem sleep entry.