Is it just the coming of age fad for kids today , or is there an underlying emotional problem linked to wanting to tattoo and put holes in yourself ?
Like you said, its just a coming of age thing, an outward sign of rebellion against his parents and their generation. Its just a way of saying "I'm here, this is me, I'm not under my parents control anymore, I'm independent and have my own mind"
I went through the same thing but with tattoos and I wasn't rebelling against my parents I was rebelling against the org
I bet if you said they were cool and went out and got one before he did he'd drop the Idea