Since we cannot get inside someone else's head to find out their line of reasoning, (if there is one), we have to struggle along making inferences from what we do see. Just a few days ago at my "real job" a young woman came into the store, and I was instantly struck by the dissonance of her chosen clothing. She had on floral pants and a printed top. Now, that description can't convey what I was seeing because I've seen florals and prints mixed to great effect.
So what am I getting at here? Is this simply the product of my own judgements and opinions on the matter of taste? Or is there another layer to this that goes deeper? I would have to admit that a part of this is about my own reactions and tastes. How could it not be? There is though, I believe, another aspect to this that is deeper seated, and tougher to recognize. We are, as humans, hard wired about certain visual cues. For example we, regardless of culture or education, respond positively to particular balances of color, proportion and shape. These are combinations that get repeated in every part of the human community, because on some unspoken level we know that they work for us. We perceive them automatically as beautiful and harmonious.
So, the next time you see someone whose appearance puzzles or dismays you for some reason, stop and give it some further thought beyond, "Wow, that sure doesn't look good". Apart from a desire to be fair-minded, based on not knowing another's full intent, its a chance to see more deeply, and possibly learn more about ourselves in the process .