Once I was in a yarn store with a friend. I was teaching her to knit and we were picking out yarn. The yarn she wanted was in a skein not in a ball, so I told her had to wind it into a ball before she started knitting. She asked, “how do you wind it into a ball?”
I cannot remember when I learned to wind yarn (or string) into a ball. I cannot remember not knowing. It never occurred to me that someone wouldn’t know how.
That happens a lot, when people have known how to do things forever. Shuffling and selecting cards is a lot like that. I tell people to shuffle and draw the cards for the reading. They sometimes look baffled and I realize that they are waiting for instructions,