system
Given the following post, respond as if you're commenting on Reddit:
human
What do we actually sense when we feel that something is wet?

As far as i know there aren't any specific receptors for 'wetness' and sometimes it feels like something is wet but as soon as you enter a warmer environment the sensation is gone. I also heard that mercury doesn't feel wet although it's liquid. How does that work?
gpt
The typical sensation of wetness is related to the coolness of the evaporative effect. When we are wet, either from sweat or an external source, the water is immediately drawing heat from our skin as it evaporates. Hot or warm water splashed on us feels different at first because it's actually adding heat. It feels wet and uncomfortable as soon as its temperature drops below our body temperature.

Mercury does not evaporate. It and other non evaporating liquids may give a sensation of its presence, but won't feel cold like water or alcohol.