I think it becomes like a game of one-upsmanship over time and trends towards freakier.
Guys getting earrings was still new in the 70’s when I got one ear pierced, the left, because piercing the right back then meant gay. Then society saw piercings move to belly buttons, lips, tongues, eyebrows, nipples and even the Prince Albert. Me, my one ear piercing eventually closed up and I never had a tattoo. The next weirdest thing I did was bleaching my hair one summer.
When we finally got internet a new world of weird opened up, at least for me after growing up in a pretty slow, old-fashioned area of the south.
I think the boundaries just keep getting pushed to be more and more strange.
Next thing you know, people are eating Tide Pods.