Maybe I'm taking a different view but I don't think "stupid" is a word that I would use to describe the action.
I don't know the OP's situation or family. As a minister who works with young adults in their 20-30s we have plenty of people in our ministry who have multipl piercings, tatoos, and other body art. Aside from two or three kinds of piercing that are innately sexual, most of it is a form of self expression. There is a strong desire to have an individualistic expression that carries them beyond the confines of daily life.
If we were honest, we'd all be a little surprised at how many people in our daily lives have body art that is concealed 95% of the time (and the 5% we don't see them.) I know more than a handful of men who have tatoos and piercings (even several who paint their toe nails) and wearing suits and dress like bankers during the week.
Self expression isn't wordly, it isn't unwise, it is what people do. How you approach it is important. I've recently been reading 10-10-10 by Suzy Welch. Her approach is pretty good. By understanding your innate values, what are the results of this decision in 10 minutes? 10 months? and 10 years?
Maybe we all should ask that question.
The ironic thing about much of this self expression is that its peer driven. I'd bet good money that the OP's daughter has some strong influeners in her peer level pushing this decision. Most all of our children have peers that are stronger influences than parents. Its the reality.
