Over the next hour, Peter and Mary Jane Parker abandoned themselves freely as they explored each other's bodies, their passion reaching ever greater heights as heated carresses and kisses gave way to raw uninhibited lust.  The pheromones they now naturally produced increased, fueling their desire for each other's bodies further, until they were blissfully unware of everything around them except each other's naked bodies, each only feeling the all-consuming desire to kiss, stroke, fondle and taste every square centimeter of the other, drawing each shudder and gasp into a long and glorious string of exquisite orgasms.

Their individual pheromones merged into something even more powerful, like two components of a binary compound.  As they continued to screw each other senseless, their bodies continued to emit this combined essence of their love.  The ambient air currents blew their pheromones from the building where Peter and MJ were fucking, spreading this essense throughout the island of Manhattan and beyond...