✔ 最佳答案
That is typically something I am fine with my kid deciding to do when he's a legal adult.
Before that age I would protect him from himself. What seems like a good idea to for instance a 16 year old may cause regret later, especially something so visible and irreversible. But it's their own possible regret that would be my concern, not any disapproval of stretched ears. When they are legal adults I really am fine with them making this decision.