I haven't ever had a child ask me about sex. I have had my younger cousins ask me what Pads and tampons are when they've found mine or someone elses. I usually just say 'It's something older girls use' and leave it at that. One of my older boy cousins asked me and I just told him to see his Mum. I didn't feel it was my place to talk about something so private.

I think it's inappropriate to tell children about sex in explicit detail at a young age. They shouldn't have to be subjected to something so mature. Sure, they want to know how things work - but there are ways to explain it to suit their age.