Emotion is perception

If a man jumped upon me In the cloaked darkness of the night Then my heart would beat and race in fear My response would be to fight Whereas if a child jumped out in daylight Wearing a mask for Hallow's Eve My heart would still race the same But only a smile it would achieve Now if you threw an object at me During the heat of a passionate row I'd be angered to a greater extent The object would be seen as an attack somehow Whereas if we were playing in the park And you threw an object at me Chances are I would throw it back And laughing childishly we would be And it is for this reason That love can easily become hate Your physiological response is the same But the perception you must await And maybe, just maybe, love doesn't exist It's only a story fabricated by society So that when my heart shall start to race I can percieve it as something that's greater than me