Benajamin Franklin is a rather fascinating fellow.
Most of us know him from the image that appears on biographies and in textbooks: Franklin with bald pate, round spectacles, and a grandfatherly expression on his face, dispensing homespun wisdom like "early to bed, early to rise", etc, etc.
I.e., he is known as basically the ideal early American pioneer; humble, hard-working, virtuous, and a fount of practical worldly wisdom; working late in his printing shop, setting up volunteer organisations for his fellow citizens, and otherwise being an all-round good guy.
When Franklin was sent to Paris to act as Ambassador for the new United States, many Americans became concerned at what France was doing to him. France was vastly more wealthy and populous than the US at that time, and Paris was notorious as the home of a decadent, libertine elite.
Stories gradually dripped out that Franklin had become quite a party hound, shmoozing with aristocrats and becoming sucked into French high society. He had replaced his modest colonial attire with the height of French aristocratic fashion and powdered wigs. He became a regular in Paris salons and frequently hosted lavish parties in his own residences.
(Indeed, he was already well-known in European intellectual circles for his work on electricity -- Kant called him the "modern Prometheus" -- and so quickly found himself invited to the most exclusive social events, meeting everyone from artists and writers to courtesans and the mistresses of powerful aristocrats.)
Thomas Jefferson -- himself a strong advocate of plain American virtue over decadent European corruption -- was seriously concerned that Franklin was losing his moral compass across the Atlantic. His concerns were only somewhat allayed by the fact that Franklin was securing multiple diplomatic coups, cementing the support of the French monarchy against the British.
(The French Empire was a vital ally of the early US; from the French POV, they were engaged in a titanic struggle for the New World against Britain and Spain, and an independent America was a useful tool in that struggle. But not much prevented France or Spain from carving out chunks of the newly independent US, and Franklin knew America was in a highly vulnerable position between the three imperial powers.)
At any rate, a few years later Franklin returned to Philadelphia and soon reverted to his humble colonial ways, dressing modestly, living simply and acting as a pillar of local society. After his return most dismissed the stories from France as either rumours, greatly exaggerated, or even outright fabrications. The stories didn't fit the Franklin they knew, and besides, the man had evidently secured great advantages for his home country, so why scrutinise his behaviour?
Hindsight tells a different story. As a young man living in London Franklin had learned the hard way the importance of learning to deal with people and the difficulty of adapting to local cultures. (For example, as a young apprentice in a London printing shop, he unknowingly earned the ire of his work colleagues by refusing to contribute to their daily beer budget.)
By his later years he had become a master of social adaptation and of dealing with people from all kinds of backgrounds. In America he acted as a humble, dedicated citizen, devoted to his public duties. In Britain before the revolution he dressed and acted as an ideal English gentleman. When posted in France, he quickly realised the plain-living ways that were encouraged in America would only alienate the French aristocracy, so he adapted his style once again.
It's quite an unusual episode that reveals a more complex, unconventional side to a rather fascinating man.