Alright, recently I was thinking about this. You know how some times when you take a first taste of something, lets say sour, the taste can be so overwhelming that it kinda hurts. But then by the second or third taste that feeling goes away, and you just taste the stuff regularly.
It happens almost all the time with sour candy for me. But today I had it happen with packaged peanut butter crackers. Also sometimes with Granny Smith apples.
Can anybody explain why this happens, or what it is?