There was a thread like this either on this board a long time ago or it was probably on the previous board I belonged to which no longer exists.

Anyway, I remember someone's reply going something like this: There's a xanax tablet that has been in your jeans pocket for God knows how long, it's probably long expired and is mis-shapen and encrusted with lint but you refuse to throw it away, you know, just in case you ever need it.