How should a parent react to there 14 year old son getting a Lip Piercing?

I believe they make the child have parent permission till 18 for a reason. I am 17 years old and have both sides done, if you don't accept it with your 14 year old then don't let him get it done. If you do accept it, then go for it. But if I was a mother, I wouldn't want him to get it done till at least 16.