I think it also depends on the culture. I know that in my best friend's culture, (She's Spanish), the babies get piercings from the moment they're born. She told me that back home, when a baby's about to be born, the parents would take gold stud earrings with them to the hospital to get the piercings right after the baby's born.
And of course, they don't do that in Western culture because it's considered abuse on the babe, I believe.
Okay, getting a babies ears pierced when they're a baby is one thing , that's not terribly uncommon where I'm from. But getting a babies ear pierced is not the same as a DICK PIERCING???? Like. There's really only one reason to get a dick piercing, it's inherently sexual, and very weird to see on a teenager

I wish they were older in the story, it feels icky watching two high schoolers have like, dick piercings and graphic sex. I know it's BL and I should expect this, but still, really squicked me out for a lot of it.