I don't understand why you think normality is defined by the object of the sentence rather than the subject.
I mean, if you take your definition of normal, surely the person speaking determines what's normal, right? That's not a good thing, because your working definition of normalcy is bad and nonsensical and only determined by your desire to antagonize somebody online on a nitpick, so you probably don't like it much yourself beyond that. But if we take it, then I get to say what's normal when I speak because normal is "the state of being usual, typical, or expected" and I'm the one having the expectations here.
The surroundings are my surroundings because it is my post.