"I went down by a different staircase, and I saw another 'Fuck you' on the wall.

"I went down by a different staircase, and I saw another 'Fuck you' on the wall. I tried to rub it off with my hand again, but this one was scratched on, with a knife or something. It wouldn't come off. It's hopeless, anyway. If you had a million years to do it in, you couldn't rub out even half the 'Fuck you' signs in the world. It's impossible." — J. D. Salinger, The Catcher in the Rye

The same thing also applies nowadays to pot leaves. — Me, Tony Noble