Forbidden worlds do exist and there are doors that allow you to walk from this world through to the others. Some of the doors are locked.

There are people who will open the doors to the other worlds from the inside but won’t step back across the threshold to this one. There are people who will open the doors from the outside, but won’t ever step across the threshold to the other worlds again. There are people who will tell you the doors are there, but won’t open them. There are people who will tell you the doors are there, open them for you, hold the door to let you through, and follow you into the next world to show you around, guiding you, maybe letting you explore on your own for a while, making sure you know your way back through the door to the old world if you aren’t having a good time. There are people who walked across a threshold once and never came back. There are people who only return from other worlds once in a great while on special occasions.

There are people who only visit the other worlds on special occasions.

There’s always some random guy who will give you a set of keys but won’t tell you what it’s supposed to unlock.

There’s probably somebody trying to bypass the doors altogether and sneak in through the bathroom window.

There are people who know the doors are there and can no longer get through.

Most people, if they even know about the doors, won’t admit the doors are there.

And then there are the people who walk back and forth among many different worlds, all the damn time. And it shows.

Some of the worlds bad. Others aren’t, but a lot of people say they are.

Some of the worlds seem bad at first but turn out to be worth a visit.

Some of the worlds seem just fine at first glance.