Remarkable (if true):
Mr Atamanenko claims that in December 1949, Soviet spies used this system to evaluate the Chinese leader Mao Zedong who was on a visit to Moscow. They had allegedly installed special toilets for Mao, which were connected not to sewers, but to secret boxes.
For 10 days Mao was plied with food and drink and his waste products whisked off for
analysis. Once Mao's stools had been scrutinised and studied, Stalin reportedly poo poo-ed the idea of signing an agreement with him.