If your teenage son or daughter wanted to get a piercing or a tattoo, would you allow them to? Why or why not?

Updates
+1 y
By piercings we are talking about ear piercings, but also piercings like gauges, facial piercings, bellybutton piercings, lower back piercings, eyebrow piercings, tongue piercings, etc.
If your teenage son or daughter wanted to get a piercing or a tattoo, would you allow them to? Why or why not?
Post Opinion