You make good points. As a busy parent, I certainly sympathesize with people that feel like they have too little time to monitor what they're kids are exposed

You make good points. As a busy parent, I certainly sympathesize with people that feel like they have too little time to monitor what they're kids are exposed to. I think one very significant factor is making sure that they can come to you, as a parent, when they come across a new concept. Of course, as you said, I would prefer to introduce the concepts on my timeline, but I also need to be ready to deal with them whent he come up. More than that, I need to make sure my kids feel comfortable coming to me when they come up. Otherwise, it won't be a discussion I need to have "right now", it will be a discussion that happens with other friends that are probably just as confused and unprepared as mine are.