Is it normal, when playing scales on the piano, to occasionally rub neighboring fingers against each other?

1. Should you lift your fingers when playing piano?

Should you lift your fingers when playing piano?

When you move a finger from one key to another, you have to lift it a little. So when you play the same key twice, you should lift it a similar amount. If you want to play loud, accented notes, it may help to lift your fingers a little farther.