I'm going to tell my gf that I'd break up with her if she got the tattoos and piercings she really wants to get
Why is she getting the tattoos?
She's into this new-age bullshit and does whatever she wants without thinking about the consequences
You shouldn't control what your girlfriends wants to do with their body. If you don't like it then break up with her.
I don't care I can do what ever I want.
Controlling your partner is abusive. You already know this isn't going to work out so you should stop and get it over with. You can find someone else who shares your values.