On my weekly visits to my mother's place, I end up showing her how to store #'s in her cell phone, program her TIVO, use her navigation system, etc. And I show her this process more than once yet it just doesn't 'sink in'.
My poor mother didn't even know about cut and paste until I saw her popping back and forth between her email and her browser typing in a URL someone sent her
But she sure can cook up a 6 course home cooked meal while on the phone in less than 1 hr and I have a hard time making scrambled eggs without tearing up the kitchen