As soon as the fellow saw that the lady didn't look exactly as advertised on "Plenty of Shit", he decided to leave the scene after eating a full Shizzo-esque meal, as a way of saying "Fuck you for deceiving me!".
We have a Swedish saying concerning things like this called "Köpa Grisen i Säcken" aka Buy the Pig in the Sack.
The expression comes from medieval days when Salesmen fooled people by putting a rat or cat in a sack but telling the customer it was a piglet.
After people bought the sack believing it was a pig, they got very annoyed when opening the sack at home.