When he was 18, Franklin went on a year-long sex tour of London with a friend, James Ralph. Their fun ended when Franklin tried to get with Ralph's girlfriend. He returned to America, fathered an illegitimate son, and married a woman so unattractive that he said she looked like a beer mug. Some of his biographers think he only settled down so he had access to sex whenever he wanted it, which was all the time.
But Franklin really hit his sexual stride once he turned 50. When he went back to London he lived with a woman and her 18-year-old daughter and may have seduced them both. He joined the Hellfire Club, an exclusive gentlemen's club whose meetings were all about alcohol, prostitutes, and orgies. When he moved to Paris in 1776, women threw themselves at him. Despite being in his 70s and suffering from some pretty debilitating illnesses, he was still all about the ladies. John Adams was in France with him and complained that he could never get Franklin to do any real work because he was surrounded by attractive women from morning to night.
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When he died, 20,000 people attended the funeral. It's pretty safe to assume that the majority of those people had bathed in the comet tail of Benjamin Franklin's balls.