The sudden death of a partner while expecting a child is so universally understood as awful that I don't think anyone with any other weight to carry is going to get to same kind of sympathy - except perhaps people who lose a child.
Carolyn HaxThe only answer that has any chance against against the information saturation kids face these days is to talk openly with kids, early enough and often enough and unflinchingly enough that you set the precedent of being the safe place they can go to ask their difficult questions. It has to happen starting when they're 2 or 3, and they ask you where babies come from and instead of freaking out and deflecting, you give facts commensurate with their ability to understand.
Carolyn HaxDon't freight your answers with any notions of what you're "supposed" to do, and just see where your feelings point you. It can feel weird to be so formal about it, but if you're not used to doing it, then there's no shame in retraining yourself.
Carolyn HaxAnd if you're a parent who thinks you're okay because your kid doesn't have a phone or iPod yet, and/or you've used all the parent controls to filter out explicit material, you're not okay. The filters are tissue paper and your kid without a phone is on a school bus or in a locker room or at a public park with phone-equipped kids every day. And they're like all kids in exploring - by whatever means available to them - exactly what their parents are treating as too embarrassing or taboo to talk about.
Carolyn Hax