Sophable, your Munch picture allows me to illustrate the mental paralysis I get when someone points out a work of art to me.
Before I even look at it I immediately get stressed at the thought that I'll have to think of something, preferably something reasonably intelligent and as un-banal as possible, to say about it.
With jittering teeth and beads of sweat on top lip I take a first look. My head is immediately filled with banalities (e.g. "looks like Ali McGraw" "looks like a poster for Hair the musical" etc etc).
The good news is that if I ignore the beads of sweat and ridiculous thoughts and carry on looking at it, I can eventually calm down and look properly (or as properly as my untutored eye is able).
It is also much, much easier to come up with a response if you hear someone else's response first. Then I can look at the picture with the other person's response in mind and see if I agree or disagree with it and what other responses come up as a result. It's as if I need something, anything, to hook onto to start looking at the thing.
Only rarely do I have a spontaneous personal response to a piece of art without this performance. It does my head in