Obviously there are things like tattoos and circumcision today. I was poking around on reddit and saw there is a forum dedicated to girls with artificial tails, and remember there is a Japanese product where girls can put on some big dog like ears which supposedly will respond to the mood of the wearer (here). So I was thinking what new high-tech and mainly cosmetic body-modifications will become mainstream over the next couple of decades? And more mainstream than the freaks who poke big holes in the cheeks or put horns in the skull.
Will it soon be fairly normal to see girls stroll down the street wagging their surgical implanted tails, raising their dog ears?