I WOZ ERE (a cautionary tale about letting your children near Nigel Rees books)
Desk-writing poetry.

I woz ere
Ere I woz
Woz i ere?
Yes I woz

Affirming. My best friend Emily McQuade once filled in the space underneath with:

You are sad
Sad you are
Are you sad?
Yes you are

We liked to imagine the first-year who wrote the original poem seeing that, and crying.
written by Si*bh*n Mor*is, approved by Susan

Emma was here
Now I'm gone
Left my name
To turn you on
"Headmaster, a group of children are gathered at the science block wall. They appear to be getting cheapies."
"What is it, Mr Huntley? Has the porn fairy been on the rounds?"
"No, sir. A girl called Emma has left her name on the wall."
"My God! That'll turn everyone on! She'll have every cock primed and ready to spunk!"
"I'll fetch the barbiturates."
"It might be too late for that - bring the hankies too."
written by Em*a War*, Jo* Blyt*, approved by Log