Hi I work with families teaching parenting skills and supporting families. And I come across this question all the time, I always advise parents to Use names that will be understood to everyone. Should anything happen to your child whilst away from you, ie sch, child minder etc, that they can tell someone straight away and be understood straight away instead of using names will not be understood to everyone. Many children have been hurt and when they have asked for help saying somebody hurt my pretty, mini,ding dong or any other made up name and have been ignored because they don't understand what they are saying esp if the adult is not from this country. I advise all parents that have already given made up names to their children to let whoever looks after them, make note of what they call their private parts. I told My sons that its called a penis and my youngest who's now 6 asked me when I was on the toilet, "mum how comes you wee out of your bum", and he started laughing then I started laughing, I replied saying Girls don't have the same as boys. I told him that girls call it private parts. This was when he was 2years old, now he's older we taught him about all the different body parts from a childrens book. Hope this info is helpful for you all. J