Percocet used for pain relief is a narcotic medication and prescriptions can prevent people from getting high on Percocet without medical reason.In fact, the Percocet high feeling can get you into lots of problems.
I think the formula of the perfume itself decides how fast it will spoil. My perfumes from Britney Spears Curious and Salvatore Ferragamo went bad within a year and a half. The Britney Spears one developed some precipitation and started smelling like alcohol, while the Salvatore Ferragamo just smelled plain weird.
When we spray perfume into the air, we smell the particles of the perfume. Are those particles a liquid or a gas? Some of us think that it is small, minute droplets of perfume liquid (like steam is condensed water vapor in the form of liquid. Some of us think that since the perfume is volatile, that the particles that we are smelling are gas particles that have evaporated from the liquid perfume.