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Sleeping under the stars, a breeze carrying a few drops of water came by. The sense of water drops on my arms woke me up.

I'm curious

  • Why does the sense of a drop of water on one's body penetrate even ultra deep slumber?
  • Is there a record of any person/s immune to this ?
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closed as not constructive by nico, jonsca, Daniel Standage, LanceLafontaine, Luke Aug 20 '12 at 10:50

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance.If this question can be reworded to fit the rules in the help center, please edit the question.

    
What kind of "why" reason are you looking for? Why as in why did it evolve / what's the advantage? Or by what mechanism? Or...? –  Armatus Jun 10 '12 at 20:28
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I voted down. It's too specific a question to be interesting or answerable. –  Noah Snyder Jun 10 '12 at 20:47
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This question could be asked about absolutely anything that has ever woken up a person once. –  LanceLafontaine Jun 10 '12 at 22:09
    
I think if you generalize this to a set of stimuli (e.g., "Why do extremely cold stimuli register to our nervous system during REM sleep (or slow-wave sleep) and other sensations do not?") it would be a passable question -- I do not believe that would be a duplicate, but check for that, too. –  jonsca Jun 10 '12 at 23:40
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@Everyone: I normally wake up if someone touches me... –  nico Jun 11 '12 at 5:32
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1 Answer 1

I do not have a source for you, though it seems to be the case that getting soaked in a heavy downpour, or washed away in a flood is not generally considered good for your health, and so their maybe an evolutionary advantage to being woken up by these potentially life threatening water-based hazards so that once can seek shelter.

Purely speculation.

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No worries; just looking for possible reasons –  Everyone Jun 11 '12 at 4:53
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