Little Johnny does it again

[rebbonk]

Discovering one of her students making faces at others on the playground, Ms. Levine stopped to gently scold the child.

Smiling sweetly the teacher said, "Johnny, when I was a child, I was told if I made ugly faces I would stay like that."

Little Johnny looked up and replied,

Spoiler:

"Well you can't say you weren't warned."

[dutchman]