"One of the immediate questions new parents face is who will provide primary care for a child. The historical choice has been the mother. Breast-feeding alone has made this both the logical and the biological choice. But the advent of the modern-day breast pump has changed the equation. At Google, I would lock my office door and pump during conference calls. People would ask, "What's that sound?" I would respond, "What sound?" When they would insist that there was a loud beeping noise that they could hear on the phone, I would say, "Oh, there's a fire truck across the street." I thought I was pretty clever until I realized that others on the call were sometimes in the same building and knew there was no fire truck. Busted."