General Petraeus’ abrupt resignation amid news of his extramarital affair brings a new wrinkle to an old story of why yet another powerful man risks so much for a woman. Frank Farley, a faculty member at Temple who studies such behavior said that risk takers "tend to believe they control their destiny or fate. The risk-taking personality has a bold quality. It's at the heart of great leadership, and sometimes it overrides what many Americans would call common sense."