So maybe this is why Americans seem to feel such a need for child-free "oases" ... I'd be interested to hear more thoughts on this subject from people of the various European cultures.
So, maybe this is less of an issue in many European cultures? I'm American, so maybe it's a little odd that I don't fret about the possibility of one of our children waking up and "catching" us, or of them seeing dogs or cats mating or giving birth (dd1 has seen me giving birth), or hearing something in a conversation, or a radio or tv-show, that raises questions in their minds. I feel totally comfortable about discussing anything my children are wondering about ...
And of course I'm not saying that we watch explicit shows or expose our children to porn ... we would never do anything like that. I'm just saying that I'm not alarmed at our children knowing about sex as a normal part of life.