Our sensory acuity antenna is constantly alert for reactions about who we are and how we look. Our memory stores any reaction, good or bad about what looks good on us. We pick up the slightest of non-verbal cues. Over your lifetime you will have stored millions of bits of information about how you look. Much of it is contradictory, misread and wrong.
Bad input carries a heavier weight in our memory banks.
That is why we run out of ideas for hairstyle choices as we age. One reason an outside party can be objective about your hair is that their internal tape recorder is blank. Our hair biases That's right, we all have hairstyle biases. How often I hear women tell me that they would never wear a certain hairstyle. That is almost always a hair bias talking.