Simply couldn't have said it better than you two myself.
This "book" is bullshit and I can proove it, I am in facl a man, a male human of a sexualy mature age, right now I'm in the middle of a collection of thoughts, "should I go to sleep now?", "Should I watch The Brave Little Toastr BEFORE going to sleep?", "I really hope that my copy of the new Pokemon game comes tomorrow." and "The hole in my boxers is now offically larger than the arse it's supposed to cover, I should probebly get some new ones." men think about plenty of stuff and I'm sick of people assuming that I think of nbothing but sex.
Hell, I'm a collossul pervert with 230+ GB of porn on my hard drive and it STILL takes up less of my thought time than Lordi's Icon of dominance (why the fuck can't I get it out of my head?!).
Having said all that, it certainly is possible for a man's head to be totally vacent, devoid of thought, empty but it not like we don't ponder the myteries of the universe from time to time.