I don't have kids, yet so I won't pretend to have any insight into how hard or important the discussion of "where you came from" is between a parent and a child. I only vaguely remember the notion of a discussion with my parents, probably because I came about the standard way. So, beyond getting over the idea of my parents "doing it" - whenever it did dawn on me - there wasn't much reason for hubbub or deep thought about it. I have to say, though, that way Fay Johnson, coordinator for the Center for Surrogate Parenting in California, told her daughter evoked an image of some movie villainess.
“I said: ‘Lily, well, Natalie and Dad were never a couple. You were ONLY created in the doctor’s office because I was going to be your mother. Would you like to see your birth certificate — because I’m going to be your mother for-EVER. Muhuahahahahahahahaha!!”
Ok. Some emphasis and poetic license taken, but I'm just sayin'.