When my son was a few months old and my dear, dear friend Anastasia was at the end of her pregnancy, she turned to me one day and said, "I have a request."

"I want us to nurse each other's babies," Anastasia said.

"Okay," I said, immediately.

What I didn't do was yell, "OMIGOD! THAT IS SO BIZARRE THAT YOU WANT TO DO THAT!" But that was my first internal reaction. Second internal reaction: how am I going to get out of this when I already said okay?