A Billion Wicked Thoughts: What the World’s Largest Experiment Reveals About Human Desire is a book you could take to your study,instead of your bedside table. It is a recenlty published scientific study of secret sexual desire,written by American neuroscientists Ogi Ogas and Sai Gaddam. The latter spends his time between Hyderabad and Boston,USA. The book lives upto its seductive title by revealing human sexual behaviour in the anonymity of the Internet.  We analysed a billion web searches,a million Web sites,a million erotic stories,a half-million erotic videos,millions of personal ads,millions of online dating responses,millions of paid subscriptions to adult sites,tens of thousands of comments on erotic sites,tens of thousands of digitized romance novels,and much more, the authors told an interviewer. The enormity of the research data may just turn some long-held sexual myths on their head. Blurb worthy insights suggest that men prefer overweight women to underweight ones and seek erotic videos featuring women in their 50s and 60s. And if that stumps you,sample this: While men form their sexual interests during adolescence and rarely change,women are dynamic in their interests and change frequently throughout their lives.