Take this: Has it ever happened that you dislike a person for "no real reasons"? You just cannot stand to see them? It could mean that you picked up on something her body language was showing.
oh yeah, happens very often, first reaction is, who is this idiot, unbearable, irritating, etc, after a period of time, they become very good friends! I guess that makes me an idiot, unbearable and irritating as well :)
"Monsters and Magical Sticks - there is no such thing as hypnosis" you must read this book to get this idea better.
in his book Steven Heller will show you what is the real mean of hypnosis and how subconscious interact with real life. his idea is that a person is always hypnotized. for him learning is hypnosis. read the book before criticize it please. so his mean idea is based on 'triggers'.
so when you meet a guy for the first time and you dislike him specially when he don't represent any offensive gesture (normal guy) that means a trigger is pulled and you have related him to someone you hate. the trigger could be anything a world a move or even something from outside.
the brain is an unstable system