(Updated April 2011)

Photo by Christopher Voelker

My dad, like a lot of fathers from his generation, waited too long to have his big sex talk with me. By then I had learned all kinds of bad habits and questionable information from my peers, most of whom were prodigious liars. But one thing Dad told me turned out to be both reliable and prophetic: “It’s all up here,” he said, tapping on his temple with his forefinger.

Chances are you have seen this kind of statement before: “The brain is the most powerful sex organ we have.” Nothing new here, but now we may have a scientific basis for understanding it, according to researcher Kim Anderson-Erisman, the current dir