I'm a grandma raising two granddaughters, ages 11 and 13.
I have double pierced ears. The first holes I did myself with a sewing needle and ice cubes at 15. My mother had a fit but she didn't make me let them close up. The second holes I got at 32 as a divorce gift to myself.
I also have a tat on my right upper back. This was a 50th birthday gift from my husband, and I can't say I regret it.
My granddaughter, 11, as well as her two younger sisters, ages 5 and 2 1/2, have pierced ears.
My 13 y/o granddaughter has no ear piercings, mostly due to a congenital ear lobe defect in one ear. Due to the location of this defect, a piercing/earring would look awkward so she has decided not to pierce her ears until she can have this surgically corrected.
Should she come home next year and want her belly button pierced I would say no, not at 14. At 14, to my mind she's still a little girl. However, at 16 I might consider it. I say might. . .
She also wants to highlight her hair and I have told her she is not going to start coloring her hair at 13. Her mother thinks I am being unreasonable but if her mother had good sense the kid wouldn't be living with me LOL. (For the record, I started coloring my hair at 15, without mom's permission, of course. I finally stopped coloring it about 8 years ago, but I'm considering highlights again. )