In a word: RUMSPRINGA!
Rumspringa is the rite of passage where Amish youth are allowed to live outside the community for varying periods of time, perhaps up to two years, and are not bound to follow their religious tenants which most of the world outside their community find strict and repressive. But while they are out they can party like it’s 1999!
Other religions have their rites where anything goes as well. But they call it Altar Boy Training.