From the book I'm reading
:whistle
Baker and Bellis...have tried to measure the extent of cuckoldry in human beings. In a block of flats in Liverpool, they found by genetic tests that less than four in every five people were the sons of their ostensible fathers. The rest were apparently fathered by somebody else. In case this was something to do with Liverpool, they did the same tests in southern England and got the same result

Comment