Because I have just seen a little boy with a number 2 birthday badge on, sitting in a pushchair with a hoop earring in one ear?
I don't know the mother but she was taking to a friend and I overheard her saying it was a present as he just had a boring stud before.
I will admit piercing childrens ears is not my thing but I generally don't see why people argue about it, fire stone reason though the fact that its a little boy shocked me more.