This is gross, why doesn't he just pee outside like other people I know?

Tony Blair had the lamp outside 10 Downing Street's famous front door fitted with a low-energy bulb. But Ken Livingstone, Mayor of London, has taken the battle for the environment to an entirely new level.
For the past 15 months, Mr Livingstone revealed to The Independent, no one in his household has flushed the toilet after urinating.
The capital's first citizen has, he explains, been conducting an experiment based on the old adage 'if it's yellow, let it mellow'. It has worked so well that he now hopes all Londoners will follow his example.