my questinon is how "nobody" can be the subject of the sentence?
subject is a person,animan or thing that can exert force.
for example in this dialogue:
-Who was knocking at the door?
-Nobody was knocking at the door.
You are confusing grammar and physics. Tina. Any noun can be the subject of a sentence.
Ghosts rattled their chains outside my door.
The hot air burned my face.
The vacuum of deep space will suck out your eyeballs.
Nothing says loving like something from the oven.
Totally i think you have fallen prey to somthing that we all do at times...overanalysing......