My nephew just turned 9. He is the oldest of 4 and they live four houses down from us. The youngest is a boy the same age as my son. He has been painting his nails along with his brothers nails and wearing girls jewelry. My son is currently 22 months but I do not want him to think this is normal. What age is appropriate to approach this and how do I approach this? I do not want the family divided however I am concerned for the impact it will have on my children.