I hardly see how tattooing a spouses name on yourself has any relevance to stretching of ears or other types of body modification. The latter is similar to practices of tribal nations, and, in my opinion, by judging those that do similar things we are being ethnocentric.
I agree that living a longer life you have seen things that I may have not, but that does not mean that you are necessarily correct in your assumptions either. Your sample of people are personal ones, and you can not generalize data from such a sample.
Sorry... it's one of my pet peves when people assume and use personal and vicarious experience to make broad sweeping psychological generalizations. It makes my field look bad.
I always told my children to try not to do things that foreclose the future. No matter how they felt in the moment, don't do, without long and sensible thought, something that might alter the future irreparably .
I didn't suggest that they should conform for the sake of fitting in but to weigh the importance of their personal expression against the price it will cost to their eventual goals. They should always be aware of the real question - will the value they get from their behavior
now balance the cost the behavior will exact in the long run?
That kind of decision making process fits into any activity from sex without condoms to skipping classes to tattoos in obvious places. If they do outrageous things, let them be things that they can recover from.
Do whatever you want, just try to realize that what is important now, may be less than important later, and you should not put yourself in the position of carrying past mistakes into the future.
On your pet peeve, you can say that society should be non-judgmental and accepting of your own personal quirks in message, but no individual can control society's judgment and people will inevitably make judgments based on their own experience.
It is not ethnocentrism because you are not of another culture; you are adapting the cultural practices of a different culture as some measure of expression - and I am free to respond to that. When I am in a foreign culture, anywhere from Burma to France, I can see any practice as a societal norm and the individual as adopting it.
You are making a statement of your difference in a very overt way for whatever reason you want, then I am free to respond that I do see the difference and judge it. You think that the difference is important and so do I. You look at the difference in a positive way. Since,
in my experience, altering body image has a long term negative affect, I am free to look at it negatively.