If I had a discussion with my son about getting gauges and he got them against my wishes, I'd be finished paying for his school. He would be on permanent spring break.
I don't expect everyone to agree with me, different strokes for different folks.
I am not going to spend a ton of money educating him and making him a marketable person in the workforce while he is doing things voluntarily to his body that make him less marketable.
I know there are exceptions, but, the only people you see around here with these things are in careers such as grocery bagger or skateboard shop clerk.