A blank book titled What Every Man Thinks About Apart From Sex has become a bestseller after becoming a hit with students in the UK.
Professor Sheridan Simove has produced the 200-page book and the work has sold out online on Amazon following heavy promotion in student unions across Britain.
The £4.69 item, which was intended as a novelty gift, is being used by students as a notebook.
"I bought a copy for my mate as a joke and he started using it as a note pad for lectures. Now everyone seems to have one. It's started a real craze on campus," The Telegraph quoted Nottingham university student Jess Lloyd as saying.
Author Sheridan Simove said, "This book is the result of 39 years of painstaking research and practical study into the subject. I left nothing to chance and really threw myself into my work.
"After many years of hard work I finally realised that men think of absolutely nothing apart from sex. It was a shocking conclusion and I realised that the world needed to be informed of my findings.
"I never thought for one moment that my life's work would be embraced by Britain's students in their thousands. It is very gratifying to see my book outselling many other academic works whose authors claim to have worked even harder than I to break new ground and further the extent of human knowledge."
Simove, 39, an Oxford University graduate who is an author, performer and entrepreneur, added: "I never anticipated that my book would be used for students to take their lecture notes in. In a sense they are proving me wrong by filling my book with content. But I wonder how many of them go back to thinking about sex once the lecture is over. I'd be willing to bet that answer is 100%. In fact I would go even further and estimate that 99% are thinking about sex even during the lecture. They probably think using my book as a notepad will help them get laid. And they are of course totally correct in that hypothesis.
"I now intend to develop my research further and am planning a PhD at the university of life on the subject of what women think about apart from sex. I hope to publish my findings in another decade."
