system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is it that when people read orders from others such as "you're now breathing in manual mode", they become aware of breathing and find it laborious?

I just read several comments telling people that they're now aware of their breathing, or that they've now got an itch somewhere on their body that they just *have to* scratch, or manually blink, and others below are cursing the guy out for making them feel uncomfortable.

Why do people become "aware" of these facts, why does it make them uncomfortable, and why can't they just ignore such comment?

Or am I weird for not being affected by such suggestions?
gpt
All of the functions you describe are semi-autonomous. Normally, your body just kind of takes care of blinking and breathing by itself, like it does with your heart and digestive system. 

The ability to actively control blinking and breathing has its obvious advantages, but the mere ability to consciously control them means that we tend to take "manual control" whenever we specifically think about the action.

Itching is a bit different, that's mostly a psychological trick.