Where sex is concerned, human reproductive biology is pretty standard: Humans are sexually bipolar, with two sexes, male and female. This is determined genetically at conception; barring a few rare and usually debilitating genetic disorders, an XX chromosome pair results in a female, and an XY pair, a male. That's just how it is. These are facts. And another fact is that the XY pairing gives the resulting child and, in time, adult, a significant advantage in sports. Now, the Women's National Basketball Association (WNBA) doesn't seem to understand that, especially with regards to "trans-women" - men - playing in...