When I was a child, my mother persistently taught me to wash my hands after touching coins and bills. They are dirty because they have been touched by various people.

Modern parents may not need to discipline their children like this.

Not stepping on books is also one of my mother's strict disciplines.

If books are stored in gadgets, there will be less risk of them being stepped on.

Of course, ever since I was old enough to understand, I don't step on books of my own volition. The act of physically expressing one's inner self to the outside must not be demeaned unless it is itself an act of insult.

Why did I remember when I was child

Will I be unable to learn new things?