Gents in pub in Loughton, Essex, 1980: "Linda Lovelace has the nicest teeth I've come across."
Men's bog at Imperial College, London, 1970: "Shit hard - it's a long way to the refectory."
Not uncommon, esp. in lavvies used by both ladies and gents:
"If you sprinkle
When you tinkle
Be a sweetie
Wipe the seatie."