Heather Carroll, author of The Duchess Of Devonshire's Gossip Guide To The 18th Century has written a funny and informative article on the courtesan Kitty Fisher. To quote:
You could say Kitty had an appetite for the finer things in life. Literally. Once she had eaten a thousand-pound banknote on her bread and butter. Yes, Miss Fisher was at the forefront of celebrity in 18th century Europe. Like her French counterpart, Madame de Pompadour, Kitty was admired despite her unwholesome career and attracted a lot of press. Of course to get to the status of a high class prostitute, courtesans like Kitty had to do their own PR in the form publishing pamphlets to advertise their wares. Kitty F--r's Merry Thoughts seemed to imply that not only would you get a lot of bang for your buck (sorry couldn't resist that one!) but some clever and witty conversation as well. No wonder Casanova refused her on the basis of her only knowing English!