And if that is indeed a true quote from the book, verbatim, it is couched in dangerously unscientific phrasing. One would think that any reputable author would have said something like "On average, thoughts about sex ..." or "In general, thoughts ..." or "By and large, thoughts..." or even "...enter most women's brains..."

Next the author will tell us that all women are more emotional, less logical, talk a lot and are bad at math. Pfahh.