"How are babies made?"

Yeah, that's how most kids would ask that uncomfortable question, which leaves parents squirming.

Here is what Rachel asked Drew the other morning at breakfast (I was upstairs, asleep):

"How do a man and a woman combine their DNA to make a baby?"

Drew described his answer, which is way more coherent that mine would have been: How each cell has a set of DNA, and how DNA in a sperm combine with DNA in an egg, and that's how a baby gets made -- more involved than I'm saying here, but you probably get the gist.