Perishability in a photograph is important in a picture.  If a photograph looks perishable we say, “Gee, I’m glad I have that moment.”

John Loengard in Pictures Under Discussion

Perishability in a photograph (like nostalgia) is a seductive, seductive liar. [Think about it] You weren’t having that much fun–that moment wasn’t that magical. Maybe I’m just a pessimist but when a moment is truly magical I don’t have time to take a picture of it. So is it true that in order to take good photographs we have to lie a little? Is the real intention of quality to mimic a supposed moment of magic? I think I’m just tired of of faking it.

“Ignoring isn’t the same as ignorance, you have to work at it.”