We have the same problem, but she's 15. She's been into piercings since she was around 12. She has 6 (I think) in each ear and her nose pierced. She really wants tattoos when she turns 18. She also wants her belly button, eyebrow, and lip pierced. She probably wouldn't tell us if she wanted her nipple pierced.
We've had many talks about health issues and infection. We've also discussed the that tattoos are permanent and what to look for at studios. JJ and I both have tattoos and piercings. I've told her that we aren't paying for anymore of her piercings and won't pay for a tattoo, but once she turns 18, it's her body and her money. We can't prevent her from doing things once she's an adult. All we can do is inform her of the facts and consequences and hope that she makes the choice that's best for her.
Good luck with the talk.
