Actually, my persepctive is that there shouldn't be the one "sit-down" talk as it once was. It seems to me that if you were open and honest with your children, and the mutual respect created good communication on an ongoing basis, then eventually you would cover all the bases and whatever topic needed to be talked about would be talked about.
As for the necessity, I think if you read the the posts already in thie thread, especially from "la petite moi" and "maleficent" you ca nsee why you absolutely MUST be part of the education process.
Really, pooped out? Since I was told it was in the "tummy" I though that the only way it come out was back up out of the mouth, so I was quite confused about labour pains for a long time, as you can imagine!
Peace,
Pierre