Indeed!
To the offspring of an "irrational" mother - first off, I would try not thinking of them as irrational. Their parental intentions are good. Believe me, things I thought were an awesome idea as a teenager are now just "stupid things I did as a teenager." I bare the tiny puncture scars to prove it. (I took out my piercings. I'm glad I never did the stretching thing.)
Now here's the bit you probably DO want to hear. I talked my mother into not only letting me get piercings but driving me to get them (I was 14, so no car yet) and helping me pay. How? I said that I was going to do it anyway but I would prefer to get it done at a reputable place and those places like parental consent. She knew I wasn't bluffing so she took me somewhere nice, rather than have me show up after an unfortunate trip to Venice Beach or something. I got a few other piercings in more or less the same way. Fortunately for me, my mother is pretty easygoing and allowed me the freedom to express myself. I like that she did that because now I can only blame myself for being an ass.
Good luck. If you get the piercings, get them done right and care for them properly.