 Highbridge, a division of recorded books, presents Testosterone Rex, Myths of Sex, Science and Society by Cordelia Fine, read by Kat Gould. But in addition to being angry, I am also hopeful because I believe deeply in the ability of human beings to make and remake themselves for the better. Jimamanda Engotsi Adichie. We should all be feminists. Introducing Testosterone Rex One memorable evening I mentioned over the family dinner that it was time to get our newly acquired dog desexed. At this point I should explain that my older son has a strange, unchild-like interest in taxidermy. Thus, ever since this boisterous loving canine entered the household, my son has been campaigning for the dog, after it dies, to live on not just in our hearts, but in a tasteful, formaldehyde-preserved pose in the living room. To my son, then, my remark about neutering offered the possibility of a stopgap until that day should come. Dropping his cutlery in excitement, he exclaimed, We could have his testicles made into a key ring. A lively debate on the merits of this idea then ensued. I share with you this intimate moment from fine family life for two reasons. First, I wish to draw attention to the fact that, contrary to a prevailing view of the feminist as the kind of person who could think of no more inspiring and motivating a start to the workday than to unlock her office with a set of keys from which dangles a man-sized pair of testicles, I strongly vetoed my son's suggestion. The second reason is that there is a useful metaphor here. A pair of testicles hanging on a key ring is bound to capture attention, to mesmerise. That's some key ring you have there, people would politely comment, but what they would really mean is that, in some important way, your identity has been defined. Idiosyncrasies, complexities, contradictions, characteristics in common with those who don't have genitals on a key ring. All this fades into the background. Who you are is someone with a testicle key ring. Biological sex can capture our attention in much the same way. We are spellbound by it. Keep it constantly in Sample complete. Ready to continue?