Some women can be fooled all of the time, and all women can be fooled some of the time, but the same woman can't be fooled by the same man in the same way more than half of the time.
Bio: Cyril Northcote Parkinson was a British naval historian and author of some 60 books, the most famous of which was his best-seller Parkinson's Law, which led him to be also considered as an important scholar in public administration and management.