sleep
"Trouble is, sleep is like nutrition for the brain. It's as important as eating a healthful diet and getting plenty of exercise"
"REM sleep is like a toilet,
Flushing proteins from my head.
REM sleep is like a toilet,
Cleans my brain while I'm in bed."
A list of REM sleep associations are in the link...
"REM sleep is like the active rinse-and-spin, occurring every 90 minutes, and each REM cycle gets longer in duration with the longest occurring in the early morning, which is why some remember dreams when the alarm sounds."
"REM sleep is like one large brainstorm, ideas unconstrained by the usual daily distractions and thoughts"
"We normally don't attend weekday night games because it means keeping our kids up too late. With Ryan in particular, his sleep cycle is like a delicate flower that needs to proper conditions to flourish. We make exceptions from time to time, but mostly try to avoid it."
"your sleep cycle is like your bodies natural alarm clock. It lets your mind and body know when to wake up and when to start feeling tired at night. Usually, this is based on whether it's dark outside or light in the morning, and how tired you're feeling."
"The sleep cycle is like a paradox of complex motions and deep tranquility entwined in one simultanous action. "
"Severe sleep apnea is like drowning hundreds of times a night. Your body is fighting to stay alive because it thinks you are being tortured, literally. Your oxygen supply is being cutoff every 10 seconds. I think waterboarding is the most accurate description of severe sleep apnea."
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.