parents need to discuss these important topics with their children at the appropriate ages. age 3-4.
children need to know never go with a stranger . even if he knows your name and offers you food/candy.
no secrets between adults and children.
children need to know when someone that is familiar to them, neighbor, friend of family, guest etc. tells them do not tell your parents what happened, or your parents don’t need to know, the child must come to his parents and tell.
you must instill these methods into the home but at the same time not to frighten the child.