Oh yes, I wasn't prepared to have a talk about the birds and bees with 5yo. I find that giving general and light answers can temporarily leave him satisfied. Of course when he was 3.5 and coming into bathroom stalls in public places with me, and he asks out loud, "Mom, what is a sanitary napkin?" because he could read the sign, I just have to answer fast and move on in a casual tone that won't attract more questions...oh just something a girl uses. That kind of general answer lets me get off the hook a lot. I have to be fast to change topics though. But there are times I just have to say, I will tell you when you get a little older.