Well, you've got brain wiring that causes you to respond to stimuli in a certain way. A small portion of that wiring is genetic (e.g. opposite sex attraction, f

Well, you've got brain wiring that causes you to respond to stimuli in a certain way. A small portion of that wiring is genetic (e.g. opposite sex attraction, fear of heights, disgust at certain smells), and the rest comes from prior sensory exposure (i.e. is learnt during your own lifetime).