It depends largely on the normal amount of friction. For road cars, generally there is a lot of friction between the tires and the road. If you stick a layer of water between them, there’s far less friction. With a dry sock and human skin, generally there’s not much friction; it’s enough to feel, but easy to overcome. When there’s a touch of water, the water tension kinda sucks the sock to your skin, giving it much more friction than normal. So it depends on how much friction is normal, and how much water you’re adding.
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