In our house, with our three sons, we deal with quite a few conversations about private parts, especially about the appropriate terms to use when speaking of such areas. I try to answer the kids' questions as honestly and appropriately as possible, with as vague and undetailed answers as I can possibly get away with.
Today while riding in the car, all was quiet until Pot Pie asked a question.
Pot Pie: "Mom, what is another name for private parts?"
Me: "Just, in general? Besides just calling them private parts?"
Pot Pie : Nodding yes.
Me: "Hmm...well, genitalia is another name."
Pot Pie: "Genitalia? What language is that?"
Me: "Its the medical term. If your doctor is charting about your body parts, he or she may call your private parts genitalia."
Pot Pie: "Does everyone know this word?"
Me: "Yes. Its a common term."
Pot Pie: "Even the French? Do they know this term?"
Cutie Pie: "Yes, of course they do. It even sounds like a French word!"
Pot Pie: "Well, my genitalia is HUUUUUGE!"
And that, folks, is what caused me to spit my drink all over the steering wheel.