Can razors get dull from non usage?

[CStevens]

I once heard that if you let a razor/knife sit unused for a long period of time without stropping, the edge will get dull. I don't blame you for laughing at this point, as I have a collection of tactical folders/pocket knives that have kept sharp for years of sitting in a knife roll. A razor have a much finer edge though. Could this be possible? I've been seriously thinking of shaving with a feather straight w/disposable blades. I just don't want my vintage collection to go neglected and "lose their mojo". Thanks for any input.