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> his bloodstream and his nervous system, but I find it very hard to believe that what he heard was actually either of those things

Sometimes if it's really quiet I can hear something that seems to pulse at about the right speed that it could be blood flowing, so I don't find that very hard to believe? Or am I hearing something else?



I can definitely hear my pulse at night in bed, or after working out. This is definitely not too far-fetched.




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