"I have never heard anyone say 'vagina' so many times in one hour!" So begins my 5th-grade son's dinner-table recount of his first Family Living class. (By the way, since I was a 5th grader I have giggled at this colloquialism for sex ed lite. What the heck does it mean, really ?) "And we talked about arm pit hair and how boys get all...um, excited... easier," he continues. I don't even know what he means by that last bit nor where to take the conversation from there, so I just keep spooning rice pilaf into my mouth and let him continue. "It was mostly vagina, vagina, vagina. She said BABIES come out of vaginas, Mom... but I know I didn't." Such confidence! It's true that neither of my kids came out of a vagina -- they were C-section births -- but I'm not entirely sure if his statement is motivated by personal history or denial of the entire how-babies-come-out story. But mostly I'm giggling and fighting the u...