Eli5: how come a smoker can sleep all through the night without their cravings waking them up? But as soon as they are awake they need to smoke!
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Much in the same way people have sleep for dinner, the body is great at shutting down its own signals when it needs to sleep. Think about how you’ll sleep through a full bladder and even have pee dreams, but you’ll still sleep through until your bladder reaches a point of pain
The interesting thing is that we’ve evolved to sleep through almost anything that the body doesn’t deem dangerous, but pain wakes people up and keeps people awake. Obviously some pain can be slept through, but the body treats pain as a threat to survival and wakes us up
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