Life as we know it
what if we are all actually dead and life as we know it is just our brain re-living our life-time through memory
oxygen
okay so the other day I finished smoking a blunt and decided to spray myself with a massive amount of cologne and as the smell exploded in my nose I started thinking what if the air we breathe everyday had a distinct smell but we've been smelling it for so long that we have become used to it and therefore it smells like nothing