Is there evidence of it in old outhouses in America or Europe? What about even farther back, to ancient times?
Does this occur in all cultures where people go to a common place to “do their business?”
Graffiti has been found on the walls of the public baths in Pompeii, but I don’t know exaclty what the writers were doing at the time. Most of the Roman public baths had places where one might relieve oneself, long benches with holes every few feet. There were no stall separaters to scribble on, though.
This stuff was fairly common in Pompeii. While the bathrooms may have been too open for graffiti (although never underestimate the ingenuity of the human animal), they found plenty elsewhere.
Here’s some samples:
Lucius pinxit.
Lucius painted this.
Suspirium puellarum Celadus thraex.
Celadus the Thracier makes the girls moan! (On the walls of the gladiator’s barracks)
Myrtis bene felas
Myrtis, you do great blow jobs
In an ancient Egyptian bathroom, they found “Cleopatra has a nice asp, but you should see Nefer’s titis!”