Quirky World: Toilet humour? Anti-pee wall paint sprays back

USA: San Francisco has painted nine walls with a repellent material that makes pee spray back off them in a bid to tackle public urination.

The walls have been coated with the clear liquid repellent material, which goes on much like paint. Any urine that hits the material sprays back on a person’s shoes and trousers.

Mohammed Nuru is director of the city’s public works department and calls himself Mr Clean.