My daughter has a tendance of walking off or talking to strangers. I explained to her that there are very bad people out there is this world who do every bad things to children. She asked like what. I told her that they might touch children in their private parts (when daughter was 5 we hired a book about good touch, bad touch ? it also told them where their private parts are). These bad people might take you away from your mummy and daddy and you may never see them again.
Now every time she sees a person she says ?mummy that could be a bad man/woman?.

Mumma_lion