When we lick a finger and put it up in the air, the side that is cooled is the one facing the direction from which the wind is blowing. But consider this, if we take a cross section of the finger, ie look at it from above, we see the wind blowing at our finger and our finger can be considered to be a cylinder.
From examples like vortex street forming around a cylindrical object, we know that a low pressure exists behind the object. Lower pressure would normally help saliva evaporate faster and thus from this point of view one would expect that the side of the finger away from the wind would evaporate faster.
What is the explanation to this?