Japan is so weird. Here's my relevant contribution, a fairy new body decoration popular there:

If I recall correctly, they inject saline into your forehead slowly, so you get basically a massive zit on your face. They then push it inwards so it looks like a bagel.
wtf i keep seeing that zit thing in tumblr user dongstomper's avatar, and i was wondering what it was
it's even weirder than i expected