America's Master Humorist on Masturbation One evening in Paris, 1879, Mark Twain rose to the podium and tackled the touchiest of subjects: masturbation. His remarks rubbed Victorian society the wrong way, and were censored for a century. Here at long last is Twain's hilarious lecture on The Science of Onanism. This edition includes an introduction and 30 vintage illustrations. Available on Kindle and in paperback from Uncensored Classics.