Whether you do or "do not seek approval of others," people make judgements about each other. In the case of tatoos and piercings, I surmise it is done to evoke a certain response from others.
From those of similar tastes, it says: "I want your approval..I am a rebel, like you."
And from those who dislike the body mutilations, it says: "Please disapprove of me..I am a rebel, unlike you. I reject your values, and seek your disapproval."
One thing is certain, because I have discussed it with employers. Many will see it as a sign of questionable judgement, regardless of whether you think it should be so. As such, it limits an individual's career potential in certain professional fields.
Mag wheels, neon lights, mud flaps, squirrel tails....
I am about ten years older than you. I am a professional woman and have had many years of college. Many of my colleagues who had tatoos and piercings are now taking out the studs and having the tatoos removed.
It is my opinion that to resist tatoos and piercings is truly 'not following the crowd'. You are a follower, my dear. Piercings and tattos were around and popular in the early punk rock days. I remember the safety pins in the nipples and the tongue piercings in the late 70's and early 80's. You were less than 10 years old when this current trend started. There is truly nothing new under the sun.