From what you heard in the news, people are becoming myth creatures by themselves, and they're doing it in a bizarre way once you began to think about it. Some say that people might have the changes in their bodies, after how long they overcome the changes to either have an abnormal lower half, or grow stuff on your butt, back, or worst head.
You have been given invites by some to your friends, and even your girlfriend to visit various places where these self changes take place. You wouldn't be interested in becoming creatures that had abnormal legs, because sometimes you feel like humanity still needed to exist before they could evolve into a different species. The thing was, if you would spend a couple more years human, you might learn more, but your friends, and girlfriend insisted, so you had no other choice in the matter.