The strange world of extramarital affairs: In 1859, congressman Daniel Sickles discovered his wife was having an affair. He forced his wife to write a detailed multi-page confession. Two days later, he saw the man she cheated with signaling to his wife from outside his window. Sickles confronted the man in broad daylight, then shot him in front of multiple witnesses. Sickles then hired a super star legal team that pioneered a brand new legal defense in American history: temporary insanity. He was acquitted of murder, went back to his seat in Congress, and later served as a Union general in the Civil War.