My 9 year old son has started asking questions about how babies are born and how they are made. The problem I have is, I'm not sure how much detail I should go into !! He's never asked anything about this stuff before so it's come as a bit of a shock !! I've bought the Usbourne book 'what is happening to me?' but after reading it I found it rather too descriptive !! Any advise would be most appreciated.