How We Perceive Something Is Wet?

Our skin has various nerve endings that respond to different stimuli. We have touch, pain, cold, and heat receptors, but we don't have specific receptors for wetness. Moreover, having neurons that are sensitive to water would be challenging since water makes up a significant portion of our cells, and having neurons constantly firing even against an internal substance would be impractical.

In a 2014 study, it was found that regions of the skin with dense hair, like our arms, are more sensitive to wetness. This is attributed to the increased sensitivity of nerve endings in areas with dense hair. Additionally, we learn the distinction between dry and wet at birth and later develop the ability to discern between hot and cold. Over time, we associate the sensation of cold clothing sticking to our skin with the awareness that the park bench we're sitting on is wet.
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