How long does a bottle of perfume stay good?

if you keep it in the cupboard and not usin it ? Before it loses its good smell, thanks:)How long does a bottle of perfume stay good?
I dont think that it goes bad.........How long does a bottle of perfume stay good?
as long as it wants to
it would depend on if it has a spray or pour on type of perfume sealed perfumes last longer in the bottle. Eau de parfum, cologne and parfume are all different strengths, with parfume being the strongest concentration of the scent. Perfume stays good for several years, depending on the quality of the perfume notes. ex. imposter perfumes change on your skin in hours, and can smell terrible, because they don't use the same notes. they smell good when you first spray them, then not so good. So stick with the real thing, keep it corked tight, and it should last a good long time.
my friend who is a cosmetologist says that it only lasts 3 months. but she could be wrong, that also goes for mascara
forever if it is not open. a year if it is open. a few months if it is in the sun.
mascara goes bad in 3 mths?!