I'm super suprised that some moms are "shocked" their kids want to know how bodies work. It is something they use everyday, multiple times a day, and we owe it to them to explain things. Just 2 days ago, I had the "birds and bees" talk with my 8 and 5yo. They already knew. I just clarified things. We do live on a farm... thus they do actually see it more than other kids. Also, we need to be teaching our kids.... wayyyyyy before the age of nine, girls parts, boys parts, and who touches them and who doesn't. One in 4 girls is abused, 1 in 6 boys by the age of 18. If mom is embarassed to talk about parts... how are they ever going to tell you if something is going on? I have worked in the abuse feild. It is our job as parents to protect.... and it goes way beyond "don't let anyone touch you there." It starts with education. A 9yo boy probably just wants a simple explanation.