Crouched beneath a stallion’s hot undercarriage, bearing the weight of a two-foot long sterile tube on my shoulder as the horse thrusts into it, I vocally encouraged him to ejaculate along with a team of human handlers dedicated to the business of equine sperm. “Come on, boy,” we all chirp, “don’t stop now!” This particular kind of human-assisted animal sex is repeated all spring and summer long at equine breeding facilities across the globe. The proliferation of Artificial Insemination (AI) techniques and technologies over the past two decades has revolutionized the equine breeding shed, making it possible to produce offspring from two horses with no physical, or even geographical, proximity. As recently as fifteen years ago, performance horse breeders imported actual horses from Europe, Russia, or South America to improve the American strains of particular breeds. Now it is possible to breed American mares to international stallions without either party leaving home. New industries and technologies have been created to collect, package, freeze, and transport equine semen; state, federal, and international laws govern the movement of semen across political borders; and a whole branch of equine veterinary medicine concerned with reproduction—theriogenology—has swelled to accommodate the growing need for professionals to supervise encounters like the one I described above. (read more...)