When I was in second grade, I had a friend I'll call Jack. We girls all thought Jack was pretty super cool because he didn't think we were gross and also, he liked to play Barbies with us instead of playing basketball with the boys. Nothing is cooler when you're seven than a boy who will play Barbies with you. Jack and I became good friends because of my awesome collection of Barbies, comprising several of my mom's old dolls from the 60s. I also had some pretty sweet Barbie furniture , including a swell potty-chair for the baby Barbies, so Jack and I became inseparable. When I look back on this, I feel a bit used. Nevertheless, Jack would come over regularly, and my mom would even let us play Barbies in my room. I will never forget the day Things Changed. I was in the midst of dressing Ken in his pastel blue shirt and matching pink tie, when Jack, who was busily undressing Barbie, gave me a conspiratorial look. "Do you know where babies come fro...