Founding Father Benjamin Franklin was a man of many interests, but his endeavors were by no means limited to technical innovation, philosophy and politics. In fact, throughout his life he had a reputation as an irredeemable lech -- literally, in later years, a dirty old man -- and his exploits were common knowledge on both sides of the Atlantic. He himself did not shy away from these accusations, and records show he even advised his younger friends on affairs, marriage, sex and romance. But was his famous 1745 letter "Advice to a Young Man on the Choice of a Mistress" meant as sincere advice, or satire?