The sperm count in men aged 50-80 years old is typically about 75 percent of the count in men aged 20-50 years.
Sperm mobility - or rather, how well sperm swim – also declines with age.
In her review, Salon's normally hyperbole-averse Tracy Clark-Flory was beside herself: "This book should be read by every woman on earth," she writes; "the implications are huge."It's not, of course, as if feminism, or Internet porn, or any other feature of modernity has suddenly created desires that never previously existed.
Rather, as Bergner and his researchers show, science is finally asking the right questions about what women want, perhaps because enough of us are ready to hear the answer.
Are men ready to cope with the reality of heterosexual women's horniness? Bergner profiles the work of a series of sexologists, all of whom have, after a series of fascinating studies with animal and human subjects, come to what is essentially the same conclusion.
Women want sex just as much as men do, and this drive is "not, for the most part, sparked or sustained by emotional intimacy and safety." When it comes to the craving for sexual variety, the research Bergner assembles suggests that women may be "even less well-suited for monogamy than men."Bergner's work puts what may be the last nail in the coffin of the old consensus that women use sex as a means to get something else they really want, such as enduring monogamous emotional intimacy and the goods and safety that come in marriage with a protector and provider.
Even as we see more and more evidence that women want what men want, antiquated sexual scripts mean that women are caught, as Friedman puts it, in a "catch-22" with "few options." But is that dilemma one for which both sexes are equally responsible? Women want sex, but they don't want to be seen as forward (or worse, desperate).
Men want sex but are intimidated, unconfident, or don't want to be seen as domineering.
So suggests a new book that shatters many of our most cherished myths about desire, including the widespread assumption that women's lust is inextricably bound up with emotional connection. Adventures in the Science of Female Desire journalist Daniel Bergner suggests that when it comes to acknowledging just how much women lust, we've passed the point of no return.
Today, I received a question from a man who wondered: How old is too old for a man to father a child? Manny, Is it possible for a man to be too old to father a baby?