>>342877879
there is no sense of touch, smell, etc.
it cant be understated how important it is just to be able to say, feel someone's body heat by just standing next to them, or sense their proximity due to that weird air pressure change shit.

and so, for many people, the mirror replaces that. you can't feel when you are headpatting someone, and there is no physical collision to tell where you are touching. so you instead use a camera or mirror to make sure.