Fact. Caflon recommends age 7 plus, when there is less chance of
A. Hitting and rupturing cartilage, which can run into to lobe
B. Uneven holes in growing lobes
C. Infection, or accidental disruption to the earing
I won't pierce pre 7, but I know plenty do.
And yes, obviously loads pierce their kids ears pre 7 and no ill effects. But Ive seen the bad results, and the training pics of shattered pierce sites.
I don't get worked up about it, but I won't do it!