Don’t Spoil The Book!

I heard a Mother
scolding her child
for folding across a page
of a library book.

She said,
‘Don’t spoil the book!
You can just fold
a little dog ear like so!’

Is a little evil more okay,
more permissible?
How about using a bookmark?

What if more readers
fold more dog ears?
More dog ears
will fall off in time.