Its interesting how the brain works. Let me explain. I got myself a new pair of spectacles today after around 4 years or so. Yes four years, or maybe more!! I never felt the need actually. Till a couple of days back. Today I went to collect it from Lawrence & Mayo at M.G. Road after having given the order the day before.
On the way back, I started noticing people - the kind of spectacles they wore. It was something that happened sub-conciously, I started looking at the eyewear and how it suited the person than looking at the person itself. Its like some kinda file you registered in your brain. The brain being a complex supercomputer has about 100 billion neurons in it. Amongst all those neurons, one of them registers a 'new glasses' file and that appears in your 'Recent Documents' list in your brain. So everytime you look at a person, the 'Recent Documents' folder tells the brain about the neuron that registered a 'new glasses' file. So automatically (without you even knowing it) you look at the glasses and all the associated properties before you actually look at the person. Its interesting how the brain works.