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Your breath should be warmer than room temperature unless you are a zombie! I am guessing you are asking why does blowing on your wet finger feel colder even though your breath is warm? Moving air allows the water on a wet finger to evaporate faster. Evaporation of a liquid to a gas requires energy and the water is taking that energy from your finger. Less energy means a lower temperature and your finger gets cold.

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13y ago

What else can I help you with?