Yeah thats one thing i like to think they do have a body but we never see it, it adds the unknown and mystery with them the backrooms it’s self is unknown and mysterious it takes the fear of the unknown to a different level by adding creatures that are mysterious and the smiler is my favorite because its a entity thats body is always surrounded by darkness so we never see it but we only see it’s twisted smile and I like the theory that there made of negative energy.