Why it is a good idea to use right little finger while playing classical guitar:
In this video I merely demonstrate how to use the right little finger. You don't need to imitate an exaggerated way in which I move my fingers
A Conversation with Stepan Rak
Imagine a pianist using five fingers in the left hand and only four in the right. The little finger of the right hand would be lifted up all the time and doing nothing – a completely crazy idea. We do a similar thing on guitar, in that we are using practically all the five fingers of the left hand, but only four fingers in the right hand. Start working with the little finger just as with the other fingers, and you will achieve much more virtuosity very soon and a brilliant technique.