In the 1960 election campaign...
JFK started a whole new male fashion trend by not wearing a hat. Prior to that, a man was not considered properly dressed if he did not wear a hat outdoors.
At his inauguration, the new President did not wear the traditional morning coat, cravat and top hat. He wore a plain business suit, and no hat at all. Traditionalists were aghast.
Today, the President's mistresses are interviewed on national television concerning intimate details of their clandestine assignations.
We've come a long way baby.