to be fair, there's a lot more going on physiologically in women than the placement of their genitalia, compared to men. I mean we get a sizable chunk of testosterone from one ball or another, but we don't routinely shed blood out of our crotches (or deal with the hormonal imbalance that comes from this, much less the whole blood loss thing), and pregnancy affects people not only on a hormonal level but on a personal level as well. This is a global thing - every woman anywhere who was ever given birth shares that experience with every other woman that's ever given birth. Men do not have a unifying experience like this.