He can use without irony, as he does in ‘The 4-Hour Body,’ lines like: ‘I was enjoying French food and a bottle of Bordeaux with a 25-year-old female yoga instructor new to San Francisco, fresh from the Midwest.’ This poor woman lets slip that she’s unable to have an orgasm. Mr. Ferriss, as any humanitarian would, makes it a point to fix this problem for her. ‘I was able to facilitate orgasms,’ he writes, ‘in every woman who acted as a test subject.’