Agreed. Should apply to drugs, abortion, body weight, and so many other things.
Except pain never enters my mind. I wouldn't do it because it just looks infantile and disgusting. Looks like a bird ate raspberries and then barfed on their arm or leg.
It's also my mind and I have a good cringe and then a laugh inside my mind looking at some of these folks and trying to guess why they think it looks so cool. Same as obese people pretending they can be both fat and healthy and that plus size women are beautiful too. But again, it's their body but I don't have to buy into their self-deception.
It's their right to do it and my right to be entertained by it, especially since I care not at all whether it helps or hurts them.
Most of them seem desperate to prove something though and just want the attention it brings.
The faded, stretched, and sagging ones on the old folks are especially laughable and I even feel a short twitch of sympathy for them. I always wonder if they are still proud of themselves for getting them.
The cartoons I watched as a kid portrayed Africans wearing grass skirts with curly hair and bones in their noses. Tats still amuse me the same way. Some obscure native tradition.
The world is full of strange folks and these are just a subset, no reason to think of them as any more or less than that. To say it's popular and growing is stretching the truth a bit though.