If you’re a guitarist you’ll know exactly what the above title is referring to. If you’re not, then let me enlighten you.
When you first learn to play the acoustic or electric guitar, initial progress is rapid. By placing your fingers on to the strings you can soon make nice noises and even start to croon a few songs you know whilst you play. In time your fingers hold down the strings with such accuracy that you no longer dampen neighbouring strings in the process.