Why London's streets stink

I vacationed in UK four years ago, and noticed some of London's streets were quite stinky. Now I know why - according to a report, 95% of Britons had urinated, vomited or defecated in public because no toilet was available. Although London first public lavatory was built in the 12th century, and public bathrooms has multiplied in the past, the current toilet shortage situation will get worse before getting any better.