A bus window, that had completely steamed up, completed a round journey of 3 hours without anyone drawing a cock on it.
The astonishing incident happened yesterday in Preston.
Lancs Bus spokesman Roger Balls said 'Usually we have to clean the inside of the windows after every trip as some greasy fingered moron will draw a penis on the window. Today we have been lucky.'
But Mark Selby of Puerile Images Seen Socially, or PISS, said 'It's our heritage. Our birthright as Britons to draw a huge cock and balls wherever we see steam, condensation or a dirty council van.'
He continued 'Since the invention of glass people have been drawing phalluses on the window pane. It is traditional. Especially when you add pubes and a bit of jizz coming out.'
Lancs Buses are considering solving the problem by using permanent marker on all windows and getting Banksy to design a postmodern satirical cock instead. But Banksy, in a rare interview, said only the classic cock and balls would suffice.