Of course our ears allow us to hear and they also help keep us balanced, but chances are there are a few things you aren't using your ears for that they can help out with. Ears can determine water temperature, it takes some concentration to train your ears to hear the difference but most people can do so. Not using any visual cues only the sound of the water pouring the viscosity of the liquid makes it sound different. Cold water is thicker and makes a lower frequency sound where hot water is thinner and makes a higher pitched sound plus hot water has more bubbles which contributes to the higher tones. Though I don't see much use for this talent it would be interesting to see if one could detect the difference between hot and cold.
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