Every once in awhile M Girl (our six-year old) asks for a baby sibling, even though I've told her that it ain't gonna happen. This time she said she wanted me to have a baby so she could go to the hospital and see how the baby gets out. (This isn't unusual since she always wants to see for herself how everything works). I told her that even if I did have another baby she probably wouldn't be able to be in the room when the baby was born. To her indignant "Why not?!" I explained that it can be scary for kids to see that because as wonderful as it is, it can be painful and she might get upset seeing mommy in pain. We talked a little more about the birth process which fascinated her (especially the part about how the baby gets out through such a small opening).
Later as I was telling my husband about that conversation, she said "Daddy, I really want mommy to have another baby. Can you make that happen?"